After unpacking the 300L, save all packing materials in case you ever need to ship the unit. Thoroughly inspect
the unit and packing materials for signs of damage. Report any shipment damage to the carrier at once; report
equipment malfunction to your dealer.
Precautions
The Lexicon 300L is a rugged device with extensive electronic protection. However, you should observe the same
reasonable precautions that apply to any piece of audio equipment.
•Always use the correct line voltage. Refer to Chapter 1 of this manual for power requirements.
•Don't install the unit in an unventilated rack, or directly above heat-producing equipment such as power
amplifiers. Maximum ambient operating temperature is 35°C (95°F).
•Never attach audio power amplifier outputs directly to any of the units connectors.
•Before turning the unit on or off, mute your monitor speakers to avoid possible damage from transients.
•To prevent fire or shock hazard, do not expose the unit to rain or moisture.
Notice
This equipment generates and uses radio frequency energy and if not installed and used properly, that is, in strict accordance with the
manufacturer's instructions, may cause interference to radio and television reception. It has been type tested and found to comply with the
limits for a Class A computing device in accordance with the specifications in Subpart J of Part 15 of FCC Rules, which are designated to provide
reasonable protection against such interference in a residential installation. However, there is no guarantee that interference will not occur
in a particular installation. If this equipment does cause interference to radio or television reception, which can be determined by turning the
equipment OFF and ON, the user is encouraged to try to correct the interference by one or more of the following measures:
Reorient the receiving antenna
Relocate the computer with respect to the receiver
Move the computer away from the receiver
Plug the computer into a different outlet so that the computer and receiver are on different branch circuits.
If necessary, the user should consult the dealer or an experienced radio/television technician for additional suggestions. The user may find
the following booklet prepared by the Federal Communications Commission helpful:
"How to identify and Resolve Radio/TV Interference Problems."
This booklet is available from the U.S. Government Printing Office, Washington, DC 20402, Stock No. 004-000-00345-4.
Le présent appareil numérique n'émet pas de bruits radioélectriques dépassant les limites applicables aux appareils numériques de la class
A prescrites dans le Règlement sur le brouillage radioélectrique édicté par le ministère des Communications du Canada.
This triangle, which appears on
your component, alerts you to
the presence of uninsulated,
dangerous voltage inside the
enclosure... voltage that may be
sufficient to constitute a risk of
shock.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
This triangle, which appears on
your component, alerts you to
important operating and maintenance instructions in this accompanying literature.
Common MIDI Problems .................................................................... 8-2
Common Time Code Problems .......................................................... 8-3
Common Digital Interfacing Problems ................................................ 8-3
Error Status Messages ....................................................................... 8-4
9.MIDI Implementation Chart
10. Specifications
Page 6
Page 7
Congratulations on your purchase of the 300L Digital Effects System with LARC
Remote Interface! The 300L not only contains the finest sounds, as you've come
to expect from Lexicon, it incorporates new functions that satisfy the needs of
today's audio production.
Analog and Digital Audio Interfacing
For both analog and digital use the 300L takes full advantage of recent advances
in converter technology and combines them with flexible digital interfacing.
The A/D and D/A converters use oversampling techniques to minimize low-level
distortion and provide linear phase characteristics. 64x oversampling Delta/
Sigma conversion is used in the A/Ds; 8x oversampling is used in the D/As. The
result is sonic transparency without the artifacts normally encountered in
conversion.
The digital I/O simplifies interfacing with both the AES/EBU professional and the
EIAJ consumer format. XLR, RCA and Optical connectors are provided for both
input and output. The digital inputs of the 300L will automatically accept and lock
to any AES/EBU/SPDIF format; the 300L's digital output format is user-selectable for feeding either professional or consumer equipment. This allows for
format conversion as well as using the high quality A/D converters to feed digital
recorders. Control of additional Channel Status information is provided as well.
Dual DSP Architechture
The 300L utilizes two proprietary high performance DSP engines. The configuration of these engines can be determined by the end-user to suit a particular
audio application. The Single Setup configuration unites both DSP engines.
Two “split” configurations: Dual Mono and Cascade, allow each DSP engine to
run a special program especially designed for “Split “ applications. The Single
algorithms include: Random Hall, Random Ambience, Rich Plate, Stereo Pitch
Shift, and Stereo Adjust. The “split" algorithms include: Dual Delays, Chamber,
Mono Pitch Shift, Compressor, a special mastering dither program called PONS
(Psychoacoustically Optimized Noise Shaping), and a less extensive version of
Stereo Adjust.
Introduction
Comprehensive Effects Automation
The 300L makes effects automation available in three different ways. If you use
time code, the 300's Event List and Time Code Reader add a new twist to effects
processing. Each entry in the 50-item list contains a time code value and a 300L
effect preset/register number, allowing incoming time code to trigger setup and
effect changes, as well as setup and effect parameter glides. For changing
effects in music or changing rooms and environments for film and video, the
300L's time code capability opens new avenues to all time code users.
Dynamic MIDI® is included for real-time performance control and effects automation. All parameters in the 300L can be patched to most MIDI controllers,
allowing full control from remote devices. For full MIDI automation all parameter
changes can be recorded on any sequencer. For additional control, complete
System Exclusive information is available.
Page 8
Lexicon Sound
Even with the best functions and features, the heart of any signal processor is
its sound. The 300L contains the very best of the Lexicon Sound — with new
refinements such as dynamic size parameters in the Reverb and Ambience
algorithms. We have also included stereo and mono pitch shifting, both straight
delay and modulated delay effects, a mastering algorithm with precision level/
balance controls and equalization. These sounds, combined with analog and
digital audio I/O, time code based effect change, an internal LFO, and full MIDI
automation result in a system that provides new creative options each time you
use it.
We’re confident you’ll find that the 300L’s combination of state-of-the-art sound
and extraordinary versatility, combined with the convenience of remote control
is exactly what you’re looking for — to make sure you don’t miss out on anything,
we’d like you to read this manual. It provides a thorough explanation of both front
panel and MIDI operation, digital and analog interfacing, descriptions of the
effects and presets, and complete MIDI Implementation data — all the information you need to access the full power of the 300L.
Page 9
Page 10
Installing the 300L
Installing the
300L
1
1-1
Page 11
300L Owner's Manual
Lexicon
Mounting
Power Requirements
Before rack-mounting the 300L, you may want to remove the four rubber feet
attached to the bottom of the chassis. Gently pry off the black plastic buttons in
the center of each foot, then remove the foot itself.
The 300L measures 19"W x 3.50"H x 13.9"D (483 x 90 x 353 mm). It uses two
EIA-standard rack spaces and can be mounted on any level surface or in a
standard 19 inch (483 mm) rack. Whatever mounting method you use, make
sure that the 300L is securely screwed into the rack adapter If the 300L is
mounted in a rack or road case, support the rear of the chassis to prevent
possible damage from mechanical shock and vibration.
The 300L is equipped with a 3-pin IEC power connector and detachable cord,
providing chassis grounding to the AC mains line. Plug the female end of the
power cord into the 300, and the male end into a wall outlet.
The 300L is internally wired to operate at 100, 120, or 230 VAC. The operating
voltage set at the factory is marked on a label attached to the rear panel. Check
the label
before
applying power to the unit.
If the voltage must be changed, refer a qualified technician to the Voltage
Changeover procedure in the 300L Service Manual.
1-2
Page 12
Time Code In
3-pin female XLR connector for input of
SMPTE (Drop or Nondrop), EBU, or FILM
time code formats.
(Electronically balanced, 100mV p-p
minimum)
Digital Inputs and Outputs
Inputs
Three connectors are provided for digital input:
AES/EBU professional format (1):
3-pin female XLR
S/PDIF EIAJ CP-340 consumer format (2):
unbalanced coaxial RCA
optical (fiber-optic)
One of these connectors may be selected for
digital input.
Outputs
Output format can be AES/EBU or S/PDIF.
Output always goes to all three digital outputs.
Digital interfaces conform to AES 3-1992 (ANSI
S4.40-1992). Input/output impedance levels of
the AES/EBU connectors comply with the
CCITT V.11 EIA RS-422A.
Installing the 300L
The Rear Panel
Analog Inputs and Outputs
3-pin XLR connectors, electronically balanced.
Either pin 2 or pin 3 can be used as high but, to
maintain polarity when transferring data to the
digital domain, pin 2 high convention is used by
Lexicon.
Pin 1 and either pin 2 or pin 3 of each output
be grounded for unbalanced operation.
Input impedance is 50kΩ unbalanced, and
100kΩ balanced. Inputs accept input levels from
-14dBu to +20dBu.
Output impedance is 75Ω, and levels up to
+18dBu are possible.
must
AC Power
Standard 3-pin IEC
power connector.
AES/EBU
PUSH
COMM PORT
DOTIME CODE IN
Communications
Port
DE9 LARC connector.
OUT
EIAJ CP340
DODI
MIDI
THRUIN
R OUTR IN
DI
DO
DI
PUSH
MIDI Connectors
Out: Transmits MIDI data to other equipment.
Thru
: Passes any MIDI data received without
change.
In
: Receives MIDI information from other MIDI
equipment such as master keyboard controllers,
MIDI foot controllers, sequencers and synthesizers.
L OUTL IN
PUSH
PUSH
INPUT
GAIN
Input Gain
2-position (In/Out)
switch for matching input gain to the source
being used.
In = +16dB; Out = 0dB.
1-3
Page 13
300L Owner's Manual
Connectors, Cables
and Configurations
Lexicon
Connectors
SignalMating ConnectorDescription
L and R AnalogXLR A3MActive balanced, pin 2 high
Audio Input+2dBu min; +20dBu max
at 0dB setting
L and R AnalogXLR A3FActive balanced; pin 2 high
Audio Output-2dBu to +18dBu
at full scale output
AES/EBUXLR A3MBalanced RS-422
Digital Inputpin 2 high
AES/EBUXLR A3FBalanced RS-422
Digital Outputpin 2 high
S/PDIFRCAUnbalanced 75Ω
EIAJ CP340
Consumer Digital
Input and Output
S/PDIFEIAJ Consumer Digital
EIAJ CP340Audio format
Consumer Digital
Audio Optical
Input and Output
For best performance, maintain balanced connections, and use high-quality,
low-capacitance, twisted-shielded pair cable.
When connecting to single-ended, unbalanced devices, connect the low side to
signal ground at the unbalanced piece of equipment.
For mono connection, connect the left and right input channels in parallel.
Be careful to keep input and output to all channels wired consistently. Out-of-
phase wiring can produce audible effects.
This interface requires balanced connections using high-quality, low-capacitance, controlled-impedance, data communication, twisted-shielded pair cable.
It will not work reliably if microphone cable is used.
This interface is unbalanced but, because it carries digital signals, it requires the
use of 75Ω RG-59 coaxial cable.
Use commercially-available, consumer audio optical cable assemblies.
Analog Audio I/O
and Time Code
AES/EBU
Digital Audio I/O
SPDIF (EIAJ CP340)
Consumer Digital Audio I/O
SPDIF (EIAJ CP340)
Consumer Digital Audio
Optical I/O
Use standard 5-pin DIN MIDI cable asemblies, available from your local dealer.
Below are recommended manufacturer's part numbers for cable and cable
assemblies. In some cases, two types are specified: one with an overall braid
shield for heavy use, and one with a foil shield for permanent installation.
Belden 9271 (foil shield)
Gotham GAC-2 AES-FRU
Maximum recommended length: 100 ft (30M)
S/PDIF (EIAJ CP340) Consumer Digital Audio
Belden 9259 (22 AWG conductor, .242 O.D.)
Belden 8218 (27 AWG conductor, .150 O.D.)
Maximum recommended length: 32 ft (10M)
S/PDIF (EIAJ CP340) Consumer Digital Audio Optical
Toshiba TOCP174y
Sony POC-15
Maximum recommended length: 16 ft (5M)
MIDI IN, OUT and THRU
1-5
Page 15
300L Owner's Manual
About the LARC
Program Select
Press to enter Program
mode. Press repeatedly to
scroll through presets in a
bank.
Register Select
Press to enter Register
mode. Press repeatedly to
scroll through registers in a
bank.
Slider Display Line
Shows abbreviated names
of the parameters currently
under the control of the sliders. Full name appears in the
Main Display.
Main Display
Shows names and values for
all selections.
PROG REG
VAR
Headroom Indicator
+12 dBm indicates analog or
digital clipping. Proper input
level is with +12 dB and ovld
unlit
LEDs
-24 18 12 6 0 6 +12 ovld dB
162738495
.
MUTE ENTER PAGECTRL MACHSTOBANK SETUP
Lexicon
Numeric Keypad
Press one of these keys to
load a program selected with
PROG or REG. Also used to
select pages.
L
Function Keys
R
0
Bank scrolls through
groups of programs or registers.
SETUP brings you to the
tope level of the user interface.
STO stores edited setups
and program registers.
CTRL toggles in and out of
the control mode.
MACH toggles between
machines when Split or
Cascade setups are selected.
Control Sliders
Adjust parameter values.
1-6
MUTE toggles the removal
and restoration of processed audio from the outputs.
ENTER loads selected setups.
PAGE steps through pages
of setup and program parameters.
Slider Display Keys
Show parameter name and
value in main display. Press
twice to engage vernier (fine)
adjustment mode when
available.
Page 16
The 300L rear panel COMM PORT connector interfaces to the Lexicon
Alphanumeric Remote Control (LARC) via a flexible 50-ft cable (supplied). The
pin assignments for the connector are shown to the right.
Installing the 300L
How to Interface
the LARC
PUSH
COMM PORT
DOTIME CODE IN
AES/EBU
OUT
EIAJ CP340
DODI
MIDI
THRUIN
DI
DO
R OUTR IN
L OUTL IN
PUSH
PUSH
INPUT
GAIN
DI
PUSH
Wiring diagram for the 300L
COMM PORTconnector.
1-7
Page 17
300L Owner's Manual
-24 18 12 6 0 6 +12 ovld dB
L
R
Lexicon
Setting Analog
Audio Levels
When shipped from the factory, the 300L is set for Analog I/O configuration.
Once you have connected the analog inputs and outputs, you should set up the
analog input (pre A/D converter) and analog output (post D/A converter) levels.
First, you will need to select a Setup which represents a digital “straight wire”
through the box. To do this, press the SETUP key, then use the PRE slider to
select Setup Preset 81.
The upper display should read:
STEREOADJUST
SG: SET P 81
Press ENTER to load the setup. Press CTRL, then press PAGE, followed by the
number 9. This will display Control Mode Page 9. The lower display will show:
IN:LFTRTOUT:LFTRT
The I/O structure of the box is specified such that if a +11dBu signal is input into
the box, full scale conversion will occur. This is indeed true if the LFT (left) input
and RT (right) input sliders are set to 0dB. In fact, with the Output sliders set to
0dB, you should read exactly the same, +11dBu. In practice, analog I/O interface
levels vary widely with various console types. The Input and Output controls on
page 9 allow the 300L to be optimized for use throughout the analog world.
With the Left and Right sliders fully attenuated to -10dB, the 300L can look at
signals as high as +21dBu. For those of you who like to “blast” through an analog
console, this full attenuation may be a requirement.
If your console typically sends a +4dBu signal when the send meters read 0VU,
the 300L’s input will be left with only 7dB before converter saturation. This is not
good. A common rock and roll soution would be a quick trim of the send masters
by -7or -10 dB to give the system a little more “breathing room”. Some analog
engineers often refer to this “breathing room” as headroom. Technically , there
is no such thing as headroom in a digital system. When the converter goes to full
scale, overload will occur. Although the rock ‘and roll solution will usually work,
but we suggest you trim the inputs to the 300L.
To do this, move the LFT and RT input sliders to the required settings. You may
need to “null” these sliders at their mid-travel points in order to “grab” the default
value of +0dB. Attenuate them one at a time and make sure they are matched.
Pressing the buttons under each of the active sliders will interrogate the current
values.
1-8
Page 18
Input levels between -1.5dBu and -2.9dBu will reference to 0 on the LARC
meters. You will find your own region of optimization.
On the output side, if +11dBu isn’t quite enough oomph! for the return inputs
(which is rarely the case) you may need to crank up the outputs. If you have
attenuated the inputs, as in the above example, the output will not be at unity gain
so you will have to boost the output sliders by the same amount. Grab each slider
individually and match the outputs.
A note on metering reverberation programs
Most Setups have the meters set for EFX-OUT. What we have described above
is getting the input and outputs “environmentally” matched.
As you start running reverb programs, you will see a natural attenuation on the
meters. This is perfectly normal. If the LARC overload LEDs do light up, DSP
overload is occurring. This is usually linked to someone’s “aggressive analog
behavior”, but there may be other times when an effect running in a delay
program has too much feedback and cross-feedback. A common pre-mastering
mistake is to run close to the edge going into an EQ process before going digitally
into a DAT. Boosting high or low frequencies is likely to overload the DSP output.
Be aware!
Installing the 300L
1-9
Page 19
300L Owner's Manual
Configurations
Connection to a
mixing console's
effects sends
Lexicon
Effects Send (L)
Effects Send (R)
Channel Input or
Effects Return (L)
Channel Input or
Effects Return (R)
OUT
EIAJ CP340
DODI
MIDI
THRUIN
DI
DO
R OUTR IN
L OUTL IN
PUSH
PUSH
INPUT
GAIN
PUSH
COMM PORT
DOTIME CODE IN
AES/EBU
DI
PUSH
If you will be using a 300L as your primary effects unit, and your system includes
a console with one or more auxiliary (effects) sends, connect the 300L as shown
above. In most applications, it is preferable to connect the 300L outputs to two
of the console's input channel strips, panned full left and right, rather than the
effects returns. This allows the greatest flexibility in routing and equalization.
In this configuration the console controls are used to set the amount of effect
heard—the 300L's MIX control should be set for 100% wet. If you are using only
one effects send, connect the left and right inputs of the 300L in parallel.
The following diagrams give a few examples of various possible configurations
for interfacing to digital equipment.
1-10
Page 20
DIGITAL AUDIO
or
DIGITAL VIDEO
MACHINE
Installing the 300L
AES/EBU to AES/EBU
AES/EBU Format
Source Machine
AES/EBU Format
DIGITAL AUDIO
or
DIGITAL VIDEO
MACHINE
Destination Machine
S/PDIF to S/PDIF
OutIn
AES/EBU
DOTIME CODE IN
PUSH
COMM PORT
DI
PUSH
OUT
EIAJ CP340
DODI
MIDI
THRUIN
DI
DO
Out
Analog outputs for monitoring
Analog outputs for monitoring
Out
R OUTR IN
L OUTL IN
PUSH
PUSH
INPUT
GAIN
CONSOLE
HEADPHONE AMP
or
RDAT MACHINE
or
CD PLAYER
S/PDIF Format
Source Machine
In
EIAJ CP340
DI
PUSH
DODI
DI
DO
MIDI
OUT
THRUIN
Out
RDAT
MACHINE
AES/EBU
DOTIME CODE IN
PUSH
COMM PORT
S/PDIF Format
Analog outputs for monitoring
Destination Machine
Note: These digital connections can be made with fiber
optic, or XLR cables instead of 75Ω coaxial RCA cables.
Analog outputs for monitoring
Out
Out
R OUTR IN
L OUTL IN
PUSH
PUSH
INPUT
GAIN
CONSOLE
HEADPHONE AMP
or
1-11
Page 21
300L Owner's Manual
AES/EBU to S/PDIF
Source Machine
DIGITAL AUDIO
or
DIGITAL VIDEO
MACHINE
Lexicon
Conversion
AES/EBU Format
Analog outputs for monitoring
RDAT
MACHINE
Destination Machine
Source Machine
RDAT MACHINE
or
CD PLAYER
In
PUSH
COMM PORT
DOTIME CODE IN
AES/EBU
EIAJ CP340
DI
PUSH
DODI
MIDI
OUT
THRUIN
Out
S/PDIF Format
Analog outputs for monitoring
S/PDIF Format
DI
DO
Out
Out
R OUTR IN
L OUTL IN
PUSH
PUSH
INPUT
GAIN
CONSOLE
or
HEADPHONE AMP
S/PDIF to AES/EBU
Conversion
DIGITAL AUDIO
DIGITAL VIDEO
Destination Machine
1-12
AES/EBU Format
or
MACHINE
OUT
EIAJ CP340
DODI
In
MIDI
THRUIN
DI
DO
PUSH
COMM PORT
Out
AES/EBU
DOTIME CODE IN
DI
PUSH
Analog outputs for monitoring
Analog outputs for monitoring
Out
Out
R OUTR IN
L OUTL IN
PUSH
PUSH
INPUT
GAIN
CONSOLE
HEADPHONE AMP
or
Page 22
Installing the 300L
ANALOG I/O and
AES/EBU to AES/EBU
Digital Source
DIGITAL AUDIO
or
DIGITAL VIDEO
MACHINE
AES/EBU Format
DIGITAL AUDIO
or
DIGITAL VIDEO
MACHINE
Digital Destination
AES/EBU Format
OutIn
AES/EBU
DOTIME CODE IN
PUSH
COMM PORT
DI
PUSH
OUT
Analog outputs for monitoring
EIAJ CP340
DODI
MIDI
THRUIN
Analog Source
ANALOG
MACHINE
or
CONSOLE
Analog audio
InIn
PUSH
PUSH
INPUT
GAIN
DI
DO
Out
R OUTR IN
L OUTL IN
Out
Analog audio
CONSOLE, HEADPHONE AMP
ANALOG MACHINE
or
Analog Destination
ANALOG I/O and
AES/EBU Digital Output
AES/EBU Format
DIGITAL AUDIO
or
DIGITAL VIDEO
MACHINE
Destination Machine
Analog outputs for monitoring
Out
PUSH
COMM PORT
DOTIME CODE IN
AES/EBU
Source Machine
CONSOLE
or
MIKE PREAMP
Analog audio
EIAJ CP340
DI
PUSH
DODI
DI
DO
MIDI
OUT
THRUIN
Out
In
R OUTR IN
L OUTL IN
Out
In
PUSH
PUSH
INPUT
GAIN
Analog audio
CONSOLE, HEADPHONE AMP
ANALOG MACHINE
or
1-13
Page 23
300L Owner's Manual
ANALOG In
with Digital Patch Point
to ANALOG Out
Lexicon
DIGITAL PROCESSOR
AES/EBU Format
Out
In
PUSH
COMM PORT
DOTIME CODE IN
AES/EBU
ANALOG
MACHINE
or
CONSOLE
Out
In
InOut
EIAJ CP340
DI
PUSH
DODI
OUT
MIDI
THRUIN
OutInOut
DI
DO
R OUTR IN
Out
In
L OUTL IN
PUSH
In
PUSH
INPUT
GAIN
1-14
Page 24
System Overview
2
System Overview
2-1
Page 25
300L Owner's Manual
Terms used
in this manual
Lexicon
In discussing 300L operation, the following terms are used.
Algorithm
The 300L contains eleven
tells the 300L's audio processors how to process the input signal. One algorithm
produces pitch shift effects, another produces reverberation, etc. Algorithms are
stored inside the 300L on ROM (Read-only memory) chips.
algorithms
. An algorithm is a set of instructions that
Configuration
The 300L can deliver two effects (one from each machine) simultaneously. The
manner in which the two machines relate to each other is called the
The machines can be used with independent inputs and outputs (Dual Mono
configuration), they can share the same stereo input signal (Single configuration), or the outputs of one machine can be fed into the input of another (Cascade
configuration).
configuration
Effect
An
effect
consists of an algorithm, the parameter values which create a specific
sound, four associated patches, and an identifying name.
.
Machine
The 300L contains two processing modules, called
Although both machines can run simultaneously, only one can be accessed from
the front panel at any given time. A dedicated function key labeled MACH allows
front panel selection of either Machine A or Machine B.
Machine
A and
Machine
B.
Pages
Because effects (and other modes of operation) have more parameters than can
be displayed at one time, parameters are grouped into several
between pages by pressing the dedicated function key labeled PAGE.
pages
. You move
Parameter
Each algorithm has a set of
The settings of the parameters can be changed to create radically different
sounds from a single algorithm.
parameters
(controls) that uniquely characterize it.
Patch
A
patch
is a routing assignment that allows one of the 300L's parameters to be
driven by a source controller (LFO, footswitch, mod wheel, etc.)
Register/Preset
Registers
effects.
overwritten, but they can be modified and stored as custom setups in the
registers. Registers and presets are differentiated on the 300L display by the
initial R (Register) or P (Preset) before their number.
are simply memory locations where you can store your own setups and
Presets
are factory-installed setups and effects. The presets cannot be
2-2
Page 26
System Overview
Effect programs:
160 effect programs are installed in the 300L to give
you a wide variety of sounds to use as is, or to use as a starting point
when creating your own sounds. (50 effect registers are provided for
storage.)
Setup presets:
150 setup presets provide a convenient starting point for
selection of effect combinations. (50 setup registers are provided for
storage.)
Setup
A
setup
consists of a internal I/O routing configuration, an identifying name, and
pointers for one or two effect programs.There are three basic types of setups:
Single, Dual Mono and Cascade.
SINGLE SETUP
INPUT LEVEL
ANALOG DIGITAL
METERS
LEFTRIGHT
INPUT BALANCE
ANALOG DIGITAL
MOD EDIT
PATCHPATCH
MACHINE
OUT MIX
EFFECT ID
BANK PROG
LFO
RATE SHAPE
SETUP
NAME
Single Setups contain pointers to a Single type Effect.
SINGLE (MACHINE A) EFFECT
RANDOM HALLSTEREO ADJUST
RANDOM AMBIENCE STEREO PITCH SHIFT
RICH PLATE
ALGORITHM
PARAMETER
VALUES
MOD EDIT
PATCH PATCH
PATCH PATCH
EFFECT
NAME
INPUT LEVEL
A LVLB LVL
METERS
LEFTRIGHT
INPUT
LEVEL
BALANCE
METERS
LEFTRIGHT
DUAL MONO SETUP
A BALB BAL
MOD EDIT
PATCHPATCH
CASCADE SETUP
INPUT
CASCADE
FEEDBACK
MOD EDIT
PATCHPATCH
MIXINPUT BALANCE
BA
EFFECT ID
MACH A MACH B
MIX
OBA
EFFECT ID
MACH A MACH B
LFO
RATE SHAPE
SETUP
NAME
LFO
RATE SHAPE
SETUP
NAME
Dual Mono and Cascade Setups each
contain pointers to 2 "Split" type Effects
SPLIT EFFECT (MACHINE A OR B)
DUAL DELAYSSMALL ST ADJUST
CHAMBERCOMPRESSOR
MONO PITCH SHIFT
ALGORITHM
SPLIT EFFECT (MACHINE A OR B)
DUAL DELAYSSMALL ST ADJUST
CHAMBERCOMPRESSOR
MONO PITCH SHIFT
ALGORITHM
PARAMETER
VALUES
PARAMETER
VALUES
MOD EDIT
PATCH PATCH
PATCH PATCH
MOD EDIT
PATCH PATCH
PATCH PATCH
EFFECT
NAME
EFFECT
NAME
2-3
Page 27
300L Owner's Manual
Lexicon
Operating Modes
The 300L is always in one of the following four operating modes:
Setup (preset or register) Select Mode
Program Preview Mode
Register Preview Mode
Control Mode
The 300L always powers up in its last operating state.
Each mode, and the paths for entering and exiting it are described below.
Setup Select Mode
Press SETUP.
This mode allows you to:
•View the machine currently being addressed by the LARC
•Display the program or preset currently running in the machine
•View and/or alter parameters
Program Preview Mode
Press PROG.
Press BANK to view program banks.
Press PROG to view programs in the bank.
This mode allows you to:
•Select factory programs
Register Preview Mode
Press REG.
Press BANK to view register banks
Press REG to view programs in the bank
This mode allows you to:
•Select, store, and recall programs from registers
Control Mode
Press CTRL. To exit, press CTRL again.
This mode allows you to:
Press CTRL to enter Control Mode. Press PAGE, then press 1. Move slider 1
(SEL) on Page one of the control program for a quick display of the following
information:
INPUT TYPE
SAMPLE RATE
DIG CONNECT
OUTPUT TYPE
PATCH POINTS
OUTPUT FORMAT
I/O EMPHASIS
EMPHASIS IN
SCMS
BYPASS MODE
LOAD MODE
MIDI AUTOMATION
MIDI CHANNEL
SYSTEM: MACH A, B
MIDI MAP MODE
TIME CODE
CURRENT SETUP
CURRENT EFFECT(S)
System Overview
Checking Your
System's Status
300L Power-Up State
Normally if power is lost, or turned off, and then restored, the 300L will return to
its last previous state.
2-5
Page 29
300L Owner's Manual
L
System OverviewThe 300L presents you with an incredible number of choices — all of which can
be made from the LARC. Although you could certainly operate the 300L by
setting each I/O configuration and effect parameter by hand each time you use
it, you probably wouldn't enjoy it — so we've tried to organize the 300L so that
its considerable flexibility doesn't become an obstacle. Before digging into the
details of operation presented in this manual, you may find this brief overview
useful.
The block diagram shown below illustrates the basic flow of audio through the
300L. Analog and/or digital audio enters on the left. Each is conditioned and
translated as required and, in the case of digital audio, a sample clock is
extracted. The resultant digital audio streams are sent to effect processing, then
converted to appropriate analog and digital outputs (on the right).
48 kHz
Digital
In
XLR
RCA
OPT
Analog
In
Digital
In
Emph
44.1 kHz
PL
SR
A/D
Sample Rate
Effect
DSP
(SR)
SR
D/A
SR
Digital
Out
Emph
Lexicon
Digital
Out
XLR
RCA
OPT
Analog
Out
0.0 or +16dB
Rear Panel
Gain Switch
-10 to +10dB
Input Level
Control
DSP
Panel, MIDI and Time Code
Program Change
-10 to +10dB
Output Level
Control
As you can see from the figure, the 300L has a rich set of I/O capabilities, with
many choices available to the user, including:
Sample Rate
Analog or Digital Input connector
Digital and Analog Emphasis/De-emphasis
Digital Output format (AES or SPDIF)
Digital Copy (SCMS) and Emphasis bit manipulation
Processor Configuration
The I/O organization is part of the 300L's Control Mode. Other items which form
part of the global operaton of the box are: Time Code event list viewing and
editing, MIDI Mapping Tables, Purge functions for User Registers,Copy Tools,
and Bypass button functions.
2-6
Page 30
By far the most important aspect of the 300L is the Setup and its association to
the digital effect(s) that you want to use. The 300L has three types of Setups:
Single, Dual Mono, and Cascade. Each is strikingly different and together they
provide incredible audio possibilities.
Each Setup includes pointers to one or more effects along with other items such
as machine input(s) and source balance(s), the relationship between wet (effect)
and dry (input) mixing for each machine, meter functions, LFO rates and
shapes, and a naming function. In addition, there are two(2) modulation patches
which can link source controllers to two Setup parameters.
To simplify the choice among the many possible effect and system routings, the
300L is shipped with 150 Setup Presets. (The organization of the Setup Presets
is shown to the side.) These factory presets cannot be overwritten, but can be
modified and stored as user setups in any of 50 setup registers.
Audio effects, of course, are what the 300L is all about, and a total of 160 Effect
Programs are provided for loading into the three Setup types. Five algorithms
can be loaded into Single setups: Random Hall, Random Ambience, Rich Plate,
Stereo Pitch Shift, and Stereo Adjust. Six different algorithms can be loaded into
the "Split" setups (Dual Mono and Cascade): Dual Delays, Split Chamber, Mono
Pitch Shift, Compressor, PONS, and Small Stereo Adjust. (The organization of
the Effect Banks is also shown to the side.)
Single Setups use one effect running in a single unified machine
(both DSP engines working as
one).
Dual Mono and Cascade can be
thought of as “split” configurations, and are capable of simultaneously running two different (or
identical) effects.
Each algorithm has its own control parameters. Random Hall, for example, has
28. An effect can also activate as many as 4 patches, each linking a source
controller to a parameter. This CONTROL function is intrinsically mapped as an
extension of the EDIT function. Saving either saves the other. (The Effect
Presets cannot be overwritten, but can be modified and stored as custom effects
in any of 50 effect registers.)
In summary, the 300L is organized into setups and effects. Setups are collections of many decisions, including DSP routing, Input levels, Source, Balances,
LFO Rate and Shape, and pointers to an effect or effects. These selections are
grouped together, named and stored so they can be called up with a single user
action. Each effect contains an algorithm, a complete set of parameters, and 4
patches. As with setups, effects can be loaded, copied, edited, named, and
stored, as well as dumped and recalled via MIDI.
Banks
Effect Programs
Effect Programs are organized
as follows:
Single Effects
(Banks 1-0)
BANK 1 HALLS
BANK 2 ROOMS
BANK 3 CHAMBERS
BANK 4 AMBIENCE
BANK 5 DIALOG
BANK 6 INSTRUMENT
BANK 7 LIVE SOUND
BANK 8 PLATES
BANK 9 STEREO ADJUST
BANK 0 STEREO SHIFT
These can only be loaded into
Single Setups (0-100)
Split Effects
(Banks 11-16)
BANK 11 DELAYS
BANK 12-MOD EFFECTS
BANK 13 SPLIT REV 1
BANK 14 SPLIT REV 2
BANK 15 MONOSHIFT
BANK 16 MASTERING
These can only be loaded into
“Split” Setups (101-150).
.
2-7
Page 31
300L Owner's Manual
Lexicon
The 300L's Control Mode provides access to general global parameters and
miscellaneous functions. Selecting Control mode does not interrupt the audio
operation of the 300.
There are 9 Control mode pages:
1. Input type select (analog and/or digital), analog sample rate select, digital
lock, digital input connector type, digital input format display and digital
output format selection.
2. SCMS detect and select, digital emphasis detect and select
3. Effect load select (Bypass, Mute) and Bypass function (Input mute, Bypass),
Copy Protect, Purge (Delete) Tools for Time Code Event List,All Registers,
All Effects, MIDI Map Table, and return to Factory Initialization.
4. Copy Tools for setups, effects, and MIDI Mod edits
5. MIDI Mode
6. MIDI Map Table
7. Time Code Mode
8. Event List Management
9. Analog I/O gain controls
Note: The 300L Digital Effects System is shipped from the factory running in an
Analog Input, 48kHz mode with Setup Preset S:P1 SINGLE running Program
Bank 1, Program 1.
If you are already familiar with the operation of the 300L and wish to change the
Input to a Digital Type, simply enter Control mode and make your selections.
If you have no previous experience with the 300L, we suggest you remain in the
analog mode and read on...
2-8
Page 32
System Operation
3
System Operation
3-1
Page 33
300L Owner's Manual
Lexicon
Getting Started
SINGLE SETUP
INPUT LEVEL
ANALOG DIGITAL
METERS
LEFTRIGHT
INPUT BALANCE
ANALOG DIGITAL
PATCHPATCH
MOD EDIT
When shipped, the 300L defaults to an Analog In, 48K sample rate state. It also
loads Setup Preset 1 Large Hall, with the Random Hall Effect
Large Hall
1 Program 1).
The Setup determines the internal I/O routing configuration, and contains
pointers for one or two effects. The three Setup types: SINGLE, DUAL MONO,
and CASCADE are shown below along with the effect types available to each.
MACHINE
OUT MIX
EFFECT ID
BANK PROG
Single Setups contain pointers to a Single type Effect.
LFO
RATE SHAPE
SETUP
NAME
SINGLE (MACHINE A) EFFECT
RANDOM HALLSTEREO ADJUST
RANDOM AMBIENCE STEREO PITCH SHIFT
RICH PLATE
ALGORITHM
PARAMETER
VALUES
MOD EDIT
PATCH PATCH
PATCH PATCH
EFFECT
NAME
(Bank
INPUT LEVEL
A LVLB LVL
METERS
LEFTRIGHT
INPUT
LEVEL
BALANCE
METERS
LEFTRIGHT
DUAL MONO SETUP
A BALB BAL
MOD EDIT
PATCHPATCH
CASCADE SETUP
INPUT
CASCADE
FEEDBACK
MOD EDIT
PATCHPATCH
MIXINPUT BALANCE
BA
EFFECT ID
MACH A MACH B
MIX
OBA
EFFECT ID
MACH A MACH B
LFO
RATE SHAPE
SETUP
NAME
LFO
RATE SHAPE
SETUP
NAME
Dual Mono and Cascade Setups each
contain pointers to 2 "Split" type Effects
SPLIT EFFECT (MACHINE A OR B)
DUAL DELAYSSMALL ST ADJUST
CHAMBERCOMPRESSOR
MONO PITCH SHIFT
ALGORITHM
SPLIT EFFECT (MACHINE A OR B)
DUAL DELAYSSMALL ST ADJUST
CHAMBERCOMPRESSOR
MONO PITCH SHIFT
ALGORITHM
PARAMETER
VALUES
PARAMETER
VALUES
MOD EDIT
PATCH PATCH
PATCH PATCH
MOD EDIT
PATCH PATCH
PATCH PATCH
EFFECT
NAME
EFFECT
NAME
3-2
Page 34
When the 300L is first powered up, the upper LARC display should read:
System Operation
LARGE HALL
SG: SET P 1
-24 18 12 6 0 6 +12 ovld dB
L
R
The slider displays should read:
SETUP:PREREGSOFT
indicating that the unit is in Setup mode. If your unit is not in Setup mode, press
the SETUP key. This simple keystroke will always take you to the top level of the
user interface.
Use the Setup PREset slider or enter a preset number via the numeric keypad
to cue a new setup into the display window. The cued setup number will blink.
Press ENTER to load the displayed Setup — and the Effect(s) associated with
it. The upper LARC display will flash "LOADING" while the Setup loads, and
"LOADED" once Setup loading is complete. This process can take several
seconds when the Setup includes reconfiguration of machines, I/O, etc.
The REG slider accesses 50 Setup Registers where you can store your
customized setups. Move the REG slider or press the button beneath the slider,
then enter a register number via the numeric keypad to cue a nd display a new
register. Press ENTER to load the displayed register. A quick "double-click" of
the button below the PRE or REG slider will put the slider into a fine resolution
mode. The slider will then cue up + or – x presets from its current position. Double
click again to exit the fine mode.
In the Setup mode, the rightmost slider (labeled SOFT) is designated as a soft
controller. Setup and/or Effect parameters can be patched to this slider for easy
access to the most useful parameters of any given effect. We have already
designed Soft Slider patches for all of the Single setups, and for most of the Dual
Mono and Cascade setups. For example, most of the Hall programs have RTM
(reverb decay) patched to the SoftSlider, while Chorus or Flange types of sounds
may have the LFO rate or feedbacks patched to the SoftSlider.
SoftSlider
3-3
Page 35
300L Owner's Manual
-24 18 12 6 0 6 +12 ovld dB
L
R
Lexicon
Selecting Analog and/
or Digital Input
The 300L, as shipped from the factory, is set to run Analog In at 48kHz. To
change the Analog Sampling rate, to slave-lock the 300L to an external digital
device, or to external system word clock, press CTRL to enter the 300L Control
mode. The first page defines the input and output structures of the 300L.
STACLK DININPOUTOFMT
This page allows you to view the current status of the box, (STA), define sample
clock speed (CLK), specify a digital Input connector (DIN), and select Input type
(INP), output type (OUT) and digital output format (OFMT).
STASystem Status (View only)
This slider lets you view (but not change) the current status of the system
parameters.
CLKAnalog Clock Rate
Press the button under the slider to show the current analog clock sample rate.
Use the slider to select a new clock sample rate. If a Digital clock has been
selected to master the 300L, the display will show the current sample rate.
DINDigital Input Connection
Before setting the 300L to receive Digital Word Clock, use this slider to designate
one digital input connector ( XLR, RCA or Optical) as the master for the system.
You can have all three connector ports occupied, but only one can be selected
as a master and audio source.
INPAnalog, Digital, or Both
Identify the type of connector which will be receiving digital clock (via DIN), then
select the Input type here. In SINGLE Setups there are three choices: ANALOG,
DIGITAL, or ANAlog + DIGital. Use the slider to select the type of input you wish
to use. If you select DIGITAL, and the system is properly locked, the display field
will briefly show “AES” or “SPDIF” to indicate the format of the incoming signal.
If the system does not detect valid word clock, or is not properly locked to
incoming word clock,a "BAD DIGITAL WORD CLOCK" message will be displayed as shown below. If you get this message, check all your cables, and other
settings.
!BAD DIGITAL
WORD CLOCK!
When you are running a Dual-Mono setup, the selections are: ANALOG,
DIGITAL, ANA-A DIG-B, ANA-B DIG-A. CASCADE Setups can be ANALOG
or DIGITAL.
3-4
Page 36
OUTOutput Types and Patch Points
Typically the 300L operates with both analog and digital outputs active. However
in the Dual-Mono and Cascade there are other options. When ANALOG inputs
are selected, the DIGITAL inputs and outputs are available as patch points,
either pre or post processing. When the DIGITAL inputs are selected, the
ANALOG inputs and outputs are available. In Cascade operation, the patch
point resource becomes available mid-DSP as well. The OUT slider gives you
access to the patch points. Similar to a “half - normalled” patch bay on a mixing
console, the outputs are always active. Selecting a patch point with this slider
effectively breaks the normal and requires a return input in order for the unit to
continue passing audio.
OFMT Selecting the Digital Output Format
This slider allows you to select AES Professional or S/PDIF (Sony/Phillips Digital
InterFace) Consumer asdigital output formats.
System Operation
Single Setups (1-100) configure both DSP engines with microcode which
enables them to function as a unified engine. Both analog and digital inputs can
be utilized simultaneously. Each type of input (A or D) has a source
Balance
control. The Level control varies the input level to the DSP engine for
Level
and
each type of input; Analog or Digital. The Balance controls determine what ratio
of Left/Right balance feeds the DSP engine. The Setup signal path is shown
below.
Dry
Analog
L
R
Analog
Level
Analog
Balance
Σ
EFFECT
EDIT
Σ
Digital
L
R
(Analog and digital input levels and balances are located on Page 2 of the Setup
mode. From the Setup display, press PAGE to view Page 2.)
Digital
Level
Digital
Balance
Dry
Single Setups
Analog and
Digital Out
Overall
Mix
L
R
ANA:LVLBAL DIG:LVLBAL
3-5
Page 37
300L Owner's Manual
Lexicon
Example
Dual Mono Setups
Virtually all Single Setups have Balance set to 50%. This means an equal
proportion of Left and Right input signal is passed into the (Single) Effect.
1. Press the button below the ANA: BAL slider (Analog Balance).
2. Pull the slider down to let more of the Left input pass through.
3. Advance the slider to allow more of the Right channel to pass through.
4. Return the parameter to 50%, allowing proper stereo to pass to the DSP
effect.
Before the signal passes into the loaded effect, a post input level and post
balance is picked off and bypasses the effect. This is the
Dry
signal path. The
Dry signal and the Wet DSP effect signal are summed and proportionally mixed
by the control labeled OMIX (Overall Mix). This control is on the next Page.
(Press PAGE once.) The resulting mix is passed out both analog and digital.
NOTE: Most studio applications assume a 100% Wet mix. Most SINGLE
Setups are set with OMIX at 100% Wet. However, it is possible that some prefade sends to the 300L will require the mix to be set to another value.
Return to the top level of the User Interface by pressing the SETUP key.
Dual Mono Setups (Setup Presets101-125) are “Split” configurations. Advance
the PRE slider to “cue up” different Dual Mono Setups. As in the Single Setups,
the upper display of the LARC shows the name of the selected Setup and its
corresponding preset number. In Dual-Mono and Cascade setups the top line
of the display will show the two types of effects loaded in the Setup. In Dual Mono
configurations each DSP engine, Mach A and Mach B, can run special split effect
algorithms and programs.
Analog and/or Digital formats can be sent into the 300L. When only one input
type (analog or digital) is specified, we refer to the format as "Fixed."
When Analog is selected as the main Input source, the Digital I/O port can be
placed in a pre or post effect patch point. Conversely, if the Digital input is
selected as the main input source, Analog I/O connections can be used as a
patch point, as described in
Selecting Analog and/or Digital Input
.
3-6
Page 38
System Operation
Fixed Format
L
Analog or
Digital
R
When
both
Analog and Digital are specified to operate as MAIN Inputs, we refer
MA
Level
MB
Level
MA
Balance
MB
Balance
Dry
Patch Points
EFFECT
EDIT A
EFFECT
EDIT B
Patch Points
Dry
to it as "Mixed Format." The Mixed format gives you the option of using the left,
right, or summed mono input signals of each type of input(Analog or Digital). In
this format, patch points are given up. The parameters for determining what
blend of Left/Right is passed to each Machine (A and B), are "MA: BAL" and “MB:
BAL", located on Page Two of the Setup mode.
MA:LVLBALMB:LVLBAL
A
Mix
B
Mix
L
Out
R
Out
Mixed Format
L
Analog
R
L
Digital
R
MA
Level
MB
Level
MA
Balance
MB
Balance
Dry
EFFECT
EDIT A
EFFECT
EDIT B
Dry
If you want to input both analog and digital audio into a Dual-Mono setup(Mixed
format), press CTRL to enter the Control mode. Page One sets the input and
output configuration for the current setup. The INP slider will scroll you through
the available selections: ANALOG or DIGITAL as well as ANA-L DIG-R and
ANA-R DIG L. In mixed format, analog audio feeds the Input to Machine A,
digital audio feeds the Input to Machine B , or vice-versa.
Machine A audio comes out Analog left (and digital left)
Machine B audio comes out Digital right (and analog right)
A
Mix
B
Mix
L
Out
R
Out
3-7
Page 39
300L Owner's Manual
Lexicon
Setup Balances
Most Dual Mono setups have the MA: BAL and MB: BAL set to Left-CHannel and
Right CHannel respectively. This assumes a fixed format type of audio
configuration. If you elect to work in a Mixed format, all Dual Mono setups will
require individual adjustment of ABAL and BBAL to 50%. This ensures that both
left and right sources will be mixed to mono before being passed to each DSP
engine. When working in a Fixed format (with only analog or digital Dual Mono
inputs), each machine has its own level control. The output of each level
adjustment is split to each source balance control.
Most Dual Mono Setup Presets default to MA: BAL panned to LEFT ONLY, and
MB: BAL panned to RIGHT ONLY. (Level and Balance controls are located on
Page Two of the Setup mode.)
*Working in a fixed dual mono mode, if you had, for example, a piano in the left
input and a voice in the right input and both Balances were set to 50%, a summed
input with equal amounts of piano and voice would be passed to each DSP
engine.
A dry signal is picked off before the signal passes into each Split DSP Effect. The
mono wet output of each DSP effect sums with the dry signal and is proportionally mixed under the MIX controls: AMIX and BMIX. The third Setup page
contains AMIX and BMIX. Continuing with the above example, if both AMIX and
BMIX were set to 0%WET, you could use AIN and BIN as level controls, mixing
two independent signals to mono as part of an analog or digital process.
Cascade Setups
Analog or
Digital
L
R
Input
Level
Input
Balance
Cascade Setups are another type of “Split” configuration. They are numbered
126-150 in Setup mode. While in Setup mode, you can use the PREset slider
to locate the Cascade Setups. Pressing ENTER will load two split type
programs: one in Machine A, the other in Machine B.
Dry
Feedback
Patch Points
Out
Dry
Σ
Σ
EFFECT
EDIT A
Patch Points
Mix
A
EFFECT
EDIT B
Feedback
B
Mix
Overall
Mix
Out
L
R
3-8
Page 40
On Page 1 of the Control mode INPut slider, there are two input selections
available when running Cascade Setups: Analog or Digital. If Analog is selected
as the main input type, then the Digital Input can be used as a patch point —
either Pre-Machine A, Mid A - B, or Post Machine B. (See
Patch Points elsewhere in this chapter.)
As in the other setups, there are Input
Output Types and
level and source Balance Controls. Cascade setups, however, have three mix
controls. AMIX proportions the dry signal to A's wet signal. BMIX proportions
the resulting A output with Machine B's output. OMIX takes the resulting A+B
mix and blends(mixes) it with the dry signal which is picked off before EFFECTA.
Cascade setups also include an overall feedback control which routes the B
output back to Machine A's input. Be careful!! This parameter can wipe out
tweeters, woofers and ears if used too liberally.
If the sum of the feedback parameters in EFFECT A , EFFECT B and the
above-mentioned overall Feedback parameter is greater than 100%,
runaway feedback will occur.
For example, assume Machine A is running a Dual delay effect with Delay1
Feedback set to 40% and Delay3 Feedback set to 40%. Machine B is running
a Mono Shift program with the feedback parameter set to 40%. The total
amount of feedback in the system is 80%. So far, so good.... that is until you
add more than 20% Cascade Feedback. BE CAREFUL!!!!
System Operation
CASCADE Setups offer an amazing number of effect combinations: Chambers
into Delays, Pitch Shifts into Chambers, Flanges into Delays, Reverbs into
Compressor, etc. You experiment, name, and store new combinations into User
Setup Registers. Remember, Input levels, Source Balances, Mix Balances,
Feedback amounts, LFO type, and, of course, the two effects are part of the
storable Setup.
3-9
Page 41
300L Owner's Manual
Lexicon
Setup Select Mode
The Setup Presets
Setup Select mode allows you to select and run Setup Presets and Registers.
The 300L is shipped with 150 Setup Presets, as well as 50 user Setup Registers
for storing your modified Setups. The Setup Presets, listed below, provide a
convenient starting point for selecting the audio DSP routing along with an
effect(s)you want to use. Virtually all Setup Presets have SoftSlider assignments made to them. Moving the SoftSlider will change the most useful aspect
of a Setup's sound characteristic. See Chapter 5 for complete descriptions of
each preset.
Single Setup Presets
Setup#Setup NameSoftSliderEffect: Bank Program
P1LARGE HALLDECAYMA: B1P1 LARGE HALL
P2MEDIUM HALLDECAYMA: B1P2 MEDIUM HALL
P3SMALL HALLDECAYMA: B1P3 SMALL HAL
P4SYNTH HALLLIVENESSMA: B1P4 SYNTH HALL
P5DANCE HALLLIVENESSMA: B1P5 DANCE HALL
P6SOLO HALLDECAYMA: B1P6 SOLO HALL
P7CHURCHDEPTHMA: B1P7 CHURCH
P8GOTHIC HALLDEPTHMA: B1P8 GOTHIC HALL
P9GATED HALLSIZEMA: B1P9 GATED HALL
P10DEEP ENDHOW DEEP?MA: B1P0 DEEP END
P11ROOMSSIZESMA: B2P1 ROOMS
P12REHURSAL ROOMPADDINGMA: B2P2 REHURSALROOM
P13STUDIO ALIVENESSMA: B2P3 STUDIO A
P14STUDIO BLIVENESSMA: B2P4 STUDIO B
P15STUDIO CLIVENESSMA: B2P5 STUDIO C
P16LARGE ROOMLIVENESSMA: B2P6 LARGE ROOM
P17SMALL ROOMLIVENESSMA: B2P7 SMALL ROOM
P18BEDROOMREFLEXIONSMA: B2P8 BEDROOM
P19W.C.DECAYMA: B2P9 W.C.
P20INVERSE ROOMDURATIONMA: B2P0 INVERSE ROOM
P21CHAMBERDECAYMA: B3P1 CHAMBER
P22BRICK WALLDIFFUSIONMA: B3P2 BRICK WAL
P23OIL DRUMTUNINGMA: B3P3 OIL DRUM
P24WIDE CHAMBERDECAYMA: B3P4 WIDE CHAMBER
P25FAT CHAMBERDECAYMA: B3P5 FAT CHAMBER
P26CHUNKYCHUNKMA: B3P6 CHUNKY
P27HOMEROOMDECAYMA: B3P7 HOMEROOM
P28OPEN WIDEDECAYMA: B3P8 OPEN WIDE
P29WET SUITDECAYMA: B3P9 WET SUIT
P30BASEMENTLIVENESSMA: B3P0 BASEMENT
P31AMBIENCESIZESMA: B4P1 AMBIENCE
P32MARBLE FOYERSLAP LEVELMA: B4P2 MARBLE FOYER
P33LARGE AMB.HIGH CUTMA: B4P3 LARGE AMB.
P34MEDIUM AMB.HIGH CUTMA: B4P4 MEDIUM AMB.
P35SMALL AMB.HIGH CUTMA: B4P5 SMALL AMB.
P36V SMALL AMB.HIGH CUTMA: B4P6 V SMALL AMB.
P37HEAVY AMB.REVERB LVLMA: B4P7 HEAVY AMB.
P38BRIGHT AMB.REVERB LVLMA: B4P8 BRIGHT AMB.
P39SMOOTH AMB.HOW SMOOTH?MA: B4P9 SMOOTH AMB.
P40WAVE AMB.HOW LONG?MA:B4P0 WAVE AMB.
P41IN A ROOMHOW BIG?MA: B5P1 IN A ROOM
P42STAIRWELL# OF FLOORSMA:B5P2 STAIRWELL
P43CAR INTERIORWINDOW DN/UPMA:B5P3 CAR INTERIOR
P44MEETING ROOMLIVENESSMA: B5P4 MEETING ROOM
P45LIVING ROOMLIVENESSMA: B5P5 LIVING ROOM
P46POWDER ROOMDECAYMA: B5P6 POWDER ROOM
P47FULL CLOSETHOW FULL?MA: B5P7 FULL CLOSET
P48PODIUMDISTANCEMA: B5P8 PODIUM
P49STUDIO DHIGH CUTMA: B5P9 STUDIO D
P50OFFICELIVENESSMA: B5P0 OFFICE
P51LIVEDRUMROOMIMPACTMA: B6P1 LIVEDRUMROOM
P52ON STAGELIVENESSMA: B6P2 ONSTAGE
P53GUITAR CAVEDECAYMA: B6P3 GUITAR CAVE
To enter Setup mode, simply press the LARC key labeled SETUP. This mode
has six pages of controls:
Page 1 represents the top level of the User Interface. It allows you to select Setup
PREsets or REGisters, and to modify SoftSlider values. The Setup is identified
as SG: (SINGLE), DM: (DUAL MONO) or CC: (CASCADE).
The 6 LARC sliders are primarily used to adjust parameter values. At the top level
of the User Interface, the slider labeled SOFT can be used as a single or multiparameter controller linking one or more parameters within Setups and Effects.
Load Setup Preset SG:P1 LARGE HALL, which contains a single effect (Large
Hall), with the MID RT parameter mapped to the SoftSlider.
The LARC should display:
LARGE HALL
SG: SET P 1
-24 18 12 6 0 6 +12 ovld dB
L
R
Setup Select
Example
Press the button below the SOFTSlider. The LARC will now display:
L
DECAY
64
-24 18 12 6 0 6 +12 ovld dB
R
The display changes to show the label associated with the SoftSlider plus the
stored value. Advance the SoftSlider and the sound of the effect will change. If
you want to return to the original sound press the button under the PRE slider,
then press ENTER.
Page 2 provides adjustment for analog and digital level and source balance into
the unified DSP engine. Simply press the key under the label of the control you
want to adjust and move the slider. As you adjust the slider, a long text message
will be shown in the display.
(The specific items available on this page are determined by the type of Setup
(Single, Dual Mono or Cascade) which is loaded.)
3-13
Page 45
300L Owner's Manual
-24 18 12 6 0 6 +12 ovld dB
L
R
Lexicon
Single Setups have only one adjustable parameter on Page 3: OMIX. This
control adjusts the proportion of “wet” signal to “dry” signal. Most SINGLE Setup
Presets have OMIX set to “WET” (100% wet effects). Dual Mono has 2 MIX
parameters; AMIX and BMIX, and Cascade has 3 MIX parameters; AMIX, BMIX,
and OMIX.
Page 4 contains the LFO (Low Frequency Oscillator). The LFO is a control
generator which is designed to modulate patched Effect or Setup parameters.
The LFO has a shape and a rate (speed) function. The shape can be SINEusoidal,
TRIANGLE, SQUARE, or RANDOM. Rate is adjustable from Off to 9.96Hz.
The action of the meters is also determined on this page. The choices are:
For Single Setups:
ANA IN (Analog In) for either Left or Right channel
DIG IN (Digital In) for either Left or Right channel
FX-OUT for either Left or Right channel ( commonly referred to as the
WET BUS)
For Dual-Mono Setups:
L INPUT
R INPUT
L FX OUT (for Mach A)
R FX OUT (for Mach B)
For Cascade Setups:
Input
Mid-Point
Output
Note: If you choose Left Meter or Right Meter as Patch sources when making
MIDI/MOD Patches, you are essentially linking the ballistics of the meter to the
assigned destination.
Page Five is the MIDI/MOD patch page for Setup parameters. As an example,
try patching the LFO to a Balance parameter as follows:
1.Load Setup Preset 1 Large Hall, as described on the previous page.
2.Press PAGE followed by the number 5. The UPPER display should read:
LARGE HALL
SETUP PAGE 5
3-14
Page 46
The lower displays over the slider will read:
SEL SRC DEST SCL THR VAL
Slider 1 (SEL) addresses the patch you are creating. Advancing the slider will
address either Patch #1 or Patch #2. For this example, pull the slider down to
create patch #1.
Slider 2 (SRC) assigns a control source which will drive the destination
parameter. Press the button directly under the slider to display:
L
OFF TO
NO PATCH
-24 18 12 6 0 6 +12 ovld dB
R
System Operation
Advance the slider and the top display line will scroll through all the available
MIDI and non-MIDI source controllers. (The last source selection is LFO.)
Slider 3 (DEST) behaves in the same way. This slider determines what Setup
parameter (the DESTination) will be controlled by the LFO. For this example,
slowly advance the slider until the display shows ANALOG BAL (Analog
Balance).
Press the button under the SCL slider to display:
L
SCALE: 100%
THRESH: 0
-24 18 12 6 0 6 +12 ovld dB
R
Sliders 4 and 5 work together to yield the overall control mechanism to the
selected destination parameter (in this example, Analog Balance). For this
example, we will not change these controls.
Slider 6 (VAL) allows you to set the displayed parameter value to the source
controller's current value. Note that changing VAL will, in most cases, require you
to modify the scale value.
Go to Page 4 (press PAGE, followed by number 4) and set the LFO rate to 1.00
Hz. To view the parameter being modified, go to Page 2 and press the button
under slider 3, ANA: BAL. This is the basic model for making MIDI/MOD patches
in the 300L.
3-15
Page 47
300L Owner's Manual
-24 18 12 6 0 6 +12 ovld dB
L
R
Lexicon
To disable the patch, press SETUP, press the button under the PRE slider, then
press ENTER to re-select the Setup, thereby restoring the original settings.
Page 6 is a dedicated page for naming the Setup with as many as 12 characters.
The two active sliders are sliders 1 and 6. Slider 1 selects the character. Slider
6 changes the character. We strongly encourage you to rename setups
whenever storing a setup.
Storing a Setup
If you make changes to any of the setup parameters, and want to save your
changes into a Setup Register, press STOre. The display will show:
AVAILABLE
SG: SET R 1
The top line of the display shows the name of the Register slot where the modified
Setup will be stored. If “AVAILABLE” is displayed, the register is empty.The
bottom line, which shows the register location where your setup will be stored,
will flash to indicate you are in the middle of a store routine. If you want to store
the setup into a different register than the one displayed, use the REGister slider
to select a different location. Press STOre again. The display will briefly read:
L
STORED
SG: SET R 1
-24 18 12 6 0 6 +12 ovld dB
R
3-16
Then will revert to the previous display (LARGE HALL SG: SET R 1).
This store process also saves the effect which is part of the Setup.
Note: The 300L has a memory protection feature which enables or disables
copying data into any of the systems internal registers, be it Setup, Program,
Time Code, or MIDI. When Copy Protect is ON, all storing functions are
inhibited. Control mode, Page 3, Slider 1 will allow you set Copy Protect ON
or OFF. For more details, see the section describing Control mode at the end
of this chapter.
Page 48
System Operation
The 300L is shipped with 160 Effect programs within the Setups described
earlier. Sooner or later you will want to alter the sounds of these effects to more
perfectly fit your requirements. To do this, load, for example Setup P1 LARGE
HALL, then press the PROG button. The upper display will show:
LARGE HALL
300MA: B01P1
-24 18 12 6 0 6 +12 ovld dB
L
R
This display tells you the name of the Effect Program which is currently in the
Setup, identifies the 300L and the Machine( in this case Machine A), along with
the Bank and Program location. At the same time the legends over the sliders
will change to show a page of effect parameters. The algorithms and their
parameters are described in detail in Chapter 4. We’ve chosen the first page of
Random Hall parameters to show here as an example:
RTMSHPSPRSIZHFCPDLY
Pressing any of the buttons directly below the sliders will display the current
value of the selected parameter. In this example, pressing the button under the
RTM slider will display:
Working with the
Effect Programs
MID RT
2.03 SEC
-24 18 12 6 0 6 +12 ovld dB
L
R
Moving the slider will change the value of the mid reverb time. (Depending on the
original starting position of the slider, it may be necessary to “null” the slider
before it assumes control of the parameter.) Parameters can be adjusted over
their entire range with the slider. The PAGE key is used to access additional
parameter pages.
When you select a new page, any previous edits remain intact. If a new Setup
or Effect Progam is loaded, however, edits will be lost unless you have stored
them.
3-17
Page 49
300L Owner's Manual
-24 18 12 6 0 6 +12 ovld dB
L
R
-24 18 12 6 0 6 +12 ovld dB
L
R
Lexicon
In Split Setups, effects are loaded into both Machine A and Machine B. Use the
MACH button to toggle between Machine Effects.For example load Setup 102
DM: REV/DLY. To do this press the SETUP key then move the PRE slider until
the upper display reads:
DM:REV/DLY
DM:SET P102
Press ENTER, then press PROG. The upper display will show:
L
DRUM CHAMBER
300MA: B13P3
-24 18 12 6 0 6 +12 ovld dB
R
The display over the sliders will change to:
RTMBASXOVSIZTDCPDLY
If you press MACH, the upper display will read:
LFO:FAZEDLYS
300MB: B12P8
and the displays over the sliders will change to:
FDLFBDFBDLFGRFG
Press the MACH key again to revert to Machine A.
3-18
Page 50
System Operation
The last two pages in any Effect Program or Register are always the MIDI Patch
Page, and the Naming Page. As these are identical in every algorithm, they are
not shown with the other effect parameters in Chapter 4. Both of these pages are
shown below for reference. The use of these pages is discussed elsewhere in
detail.
RSELSRCDESTSCLTHRVAL
SEL<L>ARGE HALLCHG
The 300L has 50 registers available to store edited versions of the preset effects.
After you have made the changes you want to an effect’s parameters, you can
store the changed version into an Effect Register by pressing STOre.The
following display will appear:
AVAILABLE
300MA: B01R1
-24 18 12 6 0 6 +12 ovld dB
L
R
The MIDI Patch Page
and the Naming Page
Storing Individual
Effect Registers
The display will show the current bank and register location is available, in this
example, B01R1. Unless you choose another location, this is where the
modified effect will be stored. The message "STORED" will be displayed briefly
to indicate that the store operation was completed. To choose a different
location, for example, B01R5, press REG repeatedly until the display shows that
location, then press STOre.
If you wish to store the modified effect in Machine B press the MACH button. The
upper display will change so that the lower line reads: 300MB: B10P5. Press
STOre and the display will change again to show:
AVAILABLE
300MB: B01R2
-24 18 12 6 0 6 +12 ovld dB
L
R
If you press STOre again, the message "STORED" will be displayed briefly to
indicate that a store operation was successfully completed to this location.
When you store an effect, it still has the same name as the original effect. To
avoid confusion, you can assign names to registers. For convenience, a naming
page is included in Effect Edit mode. To rename a register, follow the same
procedure described for naming a Setup.
3-19
Page 51
300L Owner's Manual
Lexicon
Note
Automatic Storing of
Modified Effects
The following store procedures apply
only
to effect Registers. Once you have
modified and stored these effects, you must store them into a Setup Register.
To do this, press SETUP, then press STOre. The upper display will show:
L
AVAILABLE
DM: SET R 1
-24 18 12 6 0 6 +12 ovld dB
R
Press STOre again. The message "STORED" will be displayed briefly to indicate
that a successful store operation was completed.
If you have modified the effect(s) running in the Setup and wish to skip storing
the effect or effects into specific Effect Registers, simply press the SETUP key
to return to the top level and press STOre. Select a Setup Register with the REG
slider, then press STOre again. The 300L will automatically store the modified
Effect into an available register, and then complete the Setup store. This process
will take approximately 2 seconds. The newly stored effect will be found with its
original name, truncated to allow the Setup Register ID number to be added at
the end as an identifier. See the example below.
the first 7 characters of the
original program name
S=Setup
A=Machine A
1=Setup Register 1
L
LARGE H @SA 1300MA: B01P1
-24 18 12 6 0 6 +12 ovld dB
R
If both effects in a split Setup have been modified, two effect registers will be
created, each with a machine identifier (A or B). Both effect registers will indicate
the same Setup register location, as shown in the example below.
Both effect names now reference Setup Register 1
REV/RE @SA 1
300MA: B01R2
-24 18 12 6 0 6 +12ovld dB
L
R
REV/RE @SB 1
300MA: B01R3
-24 18 12 6 0 6 +12 ovld dB
L
R
3-20
Page 52
System Operation
The BANK and PROG keys can be used to load a new Effect (or Effects) into a
Setup. This is perfectly legal to do, but may seem counter-intuitive to the direct
Setup Select operation. For those familiar with 224XL or 480L operation, this
may seem more logical.
Load Setup 1, LARGE HALL. The name of the effect which is loaded into that
setup is also “Large Hall”. If you press PROG, the display will show:
LARGE HALL
300MA: B01P1
-24 18 12 6 0 6 +12 ovld dB
L
R
indicating the Machine (MA), Bank (B1) and Program location (P1) for that Effect.
To load a different Effect into the Setup, press PROG repeatedly to locate the
Effect you want from that Bank. There are 10 Effects per Bank.
For example press PROG until the display reads:
Using Banks and
Programs
DANCE HALL
-24 18 12 6 0 6 +12 ovld dB
300MA: B01P5
The Bank and Program location will flash to indicate that DANCE HALL is
Effect currently running in the current Setup. To
load
L
R
not
the
DANCE HALL (and make
it the currently running Effect) press 5 (for Program 5). The display will briefly
show: “PROGRAM LOADED”, then revert back to display of the DANCE HALL
Bank and Program location without any flashing.
To go to another Bank, or to simply view the names of the different Banks, press
BANK repeatedly. All of the Banks will be shown sequentially. You can also
press BANK, then press a specific number key to display a particular Bank. For
example, press BANK, then press 5. The display will show:
DIALOG
300MA: B05P1
-24 18 12 6 0 6 +12 ovld dB
L
R
This display identifies DIALOG as the name of the Bank. The Bank and Program
location will flash to indicate the displayed Bank and Program location currently
running. If you are running a Single Setup, only Banks 1-0 and the Effects
continned in them are displayed and made available.
3-21
Page 53
300L Owner's Manual
-24 18 12 6 0 6 +12 ovld dB
L
R
Lexicon
If you are lost, and don’t remember which Bank and Program is currently running,
press MACH to restore the display of the currently running Bank and Program.
Remember, to
load
a Program after selecting a Bank, you must press PROG,
then enter a number. For example, to load WAVE AMB., in Bank 4 at program
location 0:
1.Press BANK
2.Press 4
3.Press PROG
4.Press 0
The display will read as follows (without flashing, as this is now the currently
running Effect.:
WAVE AMB.
300MA: B04P0
If you’ve modified an Effect and want to store it into an Effect Register, press
STOre. The display will show:
AVAILABLE
300MA: B1R1
-24 18 12 6 0 6 +12 ovld dB
L
R
3-22
The location for storing (B01R1 in this example) will be flashing. To select a
different register to store to, for example, Bank 5, Register 9, press BANK, then
press 5, then press REG repeatedly until the display shows:
L
AVAILABLE
300MA: B05R9
-24 18 12 6 0 6 +12 ovld dB
R
To store to the displayed location, press the STOre key again. The message
“STORED” will be displayed briefly before the display reverts to showing the
currently running effect.
Page 54
Banks and Programs in Split Configurations
You must be running a “Split” Setup (101 or higher) in order to load any of the
Effects in Banks 11-16. As an example, press SETUP, then use the PREset
slider to locate Setup Preset 102 (REV / DLY). This is a Dual Mono setup with
different Effects running in each machine. Press PROG, then press BANK to
identify the Bank running in one of the Machines. Press MACH to display
Machine A. The display will show:
System Operation
SPLIT REV 1
300MA: B13P3
-24 18 12 6 0 6 +12 ovld dB
L
R
Press MACH to display the Bank running in the other Machine (Machine B in this
example):
MOD DELAYS
300MB: B12P8
-24 18 12 6 0 6 +12 ovld dB
L
R
To see the Effect running in each Machine, press PROG, then press MACH
(without pressing BANK). Press MACH again to view the second Machine and
its Effect. To continue with the example above, press PROG . The display will
show:
L
LFO:FAZEDLYS
300MB: B12P8
-24 18 12 6 0 6 +12 ovld dB
R
Press MACH to display the Effect currently running in the other Machine
(Machine A in this example).
DRUMCHAMBER
300MA: B13P3
-24 18 12 6 0 6 +12 ovld dB
L
R
3-23
Page 55
300L Owner's Manual
-24 18 12 6 0 6 +12 ovld dB
L
R
Lexicon
Now, suppose you want to load two entirely different effects into each machine.
For this example, we’ll load a mono shift effect from Bank 15 into Machine A and
a reverb effect from Bank 14 into Machine B.
Press BANK, then press 1, then press 5 (Bank 15). The display will show the
Mono Shift Bank:
MONO SHIFT
300MA: B15P1
-24 18 12 6 0 6 +12 ovld dB
L
R
Press PROG repeatedly to display the Vocal Shift Program:
VOCAL SHIFT
300MA: B15P6
-24 18 12 6 0 6 +12 ovld dB
L
R
Press 6 to load this Effect into Machine A.
Press MACH to select Machine B. Press BANK, then press 1, then press 4 (Bank
14). The display will show:
SPLIT REV 2
300MB: B14P1
3-24
Press PROG repeatedly to display “BIG BRICKS” (Program 4).Now, press 4 to
load BIG BRICKS into Machine B.
Note that, when running "split" setups, only Banks 11-16 and the programs
contained in them are displayed and made available.
Page 56
With both Effects loaded, you can now modify each Effect to suit your own needs.
Once you’ve done this, you should store each Effect into its own Effect Register.
To do this, you can follow the store procedure discribed earlier for the SINGLE
Effect — performing the procedure once for each Machine, OR you can store
both of effects as part of a Setup. To do this, press SETUP. The display will show:
System Operation
DM: REV/DLY
DM: SET P102
-24 18 12 6 0 6 +12 ovld dB
L
R
Press PAGE, then press 6 to display the Setup naming page. Use the SELect
and CHG (change) sliders to enter the name “VOX/BRIX”.
Press the STOre key. The display will show:
AVAILABLE
DM: SET R 1
-24 18 12 6 0 6 +12 ovld dB
L
R
Press the STOre key again to save the Setup with the two modified Effects, and
automatically store each effect into its own Effect Registers. (Much easier!)
3-25
Page 57
300L Owner's Manual
BANK 1 HALLS
B1P1LARGE HALL
B1P2MEDIUM HALL
B1P3SMALL HALL
B1P4SYNTH HALL
B1P5DANCE HALL
B1P6SOLO HALL
B1P7CHURCH
B1P8GOTHIC HALL
B1P9GATED HALL
B1P0DEEP END
B10P1 STEREO SHIFT
B10P2 OCTAVE DOWN
B10P3 VOX CHORUS
B10P4 POLE FLANGE
B10P5 BULKIE ROLL
B10P6 MR. BIG
B10P7 ZORCH!
B10P8 GOING,GOING
B10P9 GTR CHORUS
B10P0 FADE DOWN
B14P1 BIG HALL
B14P2 GREAT ROOM
B14P3 GREAT HALL
B14P4 BIG BRICKS
B14P5 DRUM ROOMS
B14P6 DELAY ROOM
B14P7 RECITAL HALL
B14P8 BIG BATHROOM
B14P9 PLATE
B14P0 SIZZLECITY
BANK 15 MONOSHIFT
B15P1 SHIFT IT!
B15P2 GUIT SHIFT
B15P3 UP SHIFT
B15P4 DOWN SHIFT
B15P5 EKO SHIFT
B15P6 VOCAL SHIFT
B15P7 SKY DOWN
B15P8 ECHO DOWN
B15P9 HALFSTEPSUP
B15P0 HALFSTEPSDN
BANK 16 MASTERING
B16P1 EZ COMP 2:1
B16P2 DRUM COMP 3:1
B16P3 VOICE OVER
B16P4 COMP 4 VERB
B16P5 SMAKO!
B16P6 SMALL ST ADJ
B16P7 PANOLA
B16P8 FILTER PASS
B16P9 SPATIAL EQ
B16P0 PONS
3-26
Page 58
System Operation
MIDI/Modulation patching allows you establish dynamic relationships between
Setup and Effect parameters and either MIDI controllers (Mod Wheel, Pitch
Bend, etc.)or internal controllers (LFO, Display Meters). Mod patches are used
to create or modify Dynamic MIDI patches. To use Dynamic MIDI, you assign a
MIDI controller to a setup parameter or to an effect parameter. Two Setup
patches are available in Setup mode. Four patches are available in any Effect
which is running in a Setup.
The following procedure is used to create a mod patch in either a Setup or an
Effect .
To create a patch to a Setup, press SETUP, press PAGE, then press 5. To create
a patch to an Effect, press PROG, then press PAGE until the following display
appears.
L
EFFECT NAME
PATCH n
-24 18 12 6 0 6 +12 ovld dB
R
The lower display shows:
SELSRCDESTSCLTHRVAL
SEL (Select): This slider is used to select a patch operation. There are 2 for
Setups and 4 for each Effect.
SRC (Source): This is used to select the controller (source) that you want to
control the 300L parameter. Choices include external MIDI controllers, internal
controllers such as the LFO, Meter, or SoftSlider. The available source controllers are listed to the side.
DST (Destination): This slider allows you to select which parameter you want
the designated source to control. The choices will include all of the parameters
of the currently running algorithm.
SCL (Scale): This slider sets the effective control range of the source. Scaling
can be set from -200% to +200%. When Scale is set to 100%, the full range of
the controller will cover the full range of the selected parameter. Setting a
negative value will give the controller inverse control of the parameter values.
MIDI/Modulation
Patching
OFF
CNTLR- 0
MODWHEEL
BREATH
CNTLR-3
FOOTPED
PORTATIME
VOLUME
CNTLR-9
PAN
EXPRESSN
CNTLR-12-15
GPCNTRL1-4
CNTRL20-31
SUSTAIN
PORTA SW
SOSTENSW
SOFTPED
SWITCH68-79
GP CNTRL5-8
SWITCH84-95
PITCHWHL
AFTERTCH
LASTNOTE
LAST VEL
MIDI CLK
SOFTSLID
L-METER
R-METER
LFO
Available "Source" selections
THR (Threshold): This slider sets a threshold below which the controller will
have no effect on the parameter. (1-127)
VAL (Value): Pressing the button directly below the VAL slider will display the
current parameter value. The slider lets you match the value of the destination
parameter to the source controller's current value. This is provided as a
convenience for setting parameters when making mod patches.
3-27
Page 59
300L Owner's Manual
Lexicon
Note: Be extremely careful when creating patches while a MIDI device is
connected. If you accidentally send a MIDI Program Change before
saving the patches in a register, the patches will be lost. To avoid this
possibility, you may want to set the MIDI Master Channel (in Control
Mode) to OFF, or unplug the MIDI cable from the 300L rear-panel MIDI IN
connector.
Control Mode
Page One
Analog and Digital
Audio Selection
Control mode provides access to general global parameters and miscellaneous
functions including certain aspects of the audio configuration. Selecting Control
mode does not interrupt the audio operation of the 300L.
There are nine Control mode pages:
Analog and Digital audio selection
Emphasis and SCMS
Copy Protect (on, off), Bypass/Mute, Program Load, Memory Purge
Offline Copy Tools
MIDI Automation, Dumps, and Channel
MIDI Maps
Time Code Snap and View
Time Code Event List and Edit /Add / Delete
Input/Output Gain
Each of these pages is described below.
Page One allows you to view the status of the box (STA), to define clock speed
(CLK), Digital Input connector (DIN), Input type (INP), Output type (OUT) and
Digital Output Format (OFMT).
STACLKDININPOUTOFMT
3-28
STA (System Status)
The STAtus slider allows you to view the operational status of the system.
Advancing the slider scrolls through the status of: Input type, current clock
speed, digital output format, SCMS output status, audio mute status, copy
enable or disable, digital input connector, output type, I/O emphasis, digital
emphasis, bypass mode, load mode, automation, MIDI channel assignments for
Machines A and B, Map mode, Timecode mode, Current Setup, Current effect
for Machine A and B.
CLK (Changing the Analog Clock Rate)
This slider allows selection of the analog sampling rate. Press the button under
the slider to show the current rate. Use the slider to select a new clock sample
rate. If Digital clock has been selected to master the 300L this display will show
the current sample rate. If valid clock is not present, the message “!BAD DIGITAL
WORD CLOCK!” will be displayed.
Page 60
DIN (Digital Input Connector)
Specifying the Digital Input connector should be done before setting the 300L to
receive Digital Word Clock. Use the slider to specify XLR, RCA, or OPT
connector. All three connector ports can be occupied, but only one can be
selected to be the audio source for the system.
INP (Input — Analog and/or Digital)
Before moving this slider, be sure to identify the type of input connector which
will be receiving digital clock with the DIN controller. In SINGLE and CASCADE
Setups there are three choices: ANALOG, DIGITAL, or ANA + DIG. If you select
DIGITAL, and the system is properly locked, the Input field will briefly display
either “AES” or “SPDIF”. If the system is not properly locked to the incoming word
clock, the message “!BAD DIGITAL WORD CLOCK!” will be displayed. If you
see this message, check your cables.
When a Dual-Mono setup is running, the selections are: ANALOG, DIGITAL,
ANA-A DIG-B, and ANA-B DIG-A.
When a Cascade Setup is running, the selections are ANALOG or DIGITAL.
OUT (Output Types and Patch Points)
The 300L is typically operated with active analog and digital outputs. In the DualMono and Cascade modes, however, there are other options. When ANALOG
inputs are selected, the DIGITAL outs and ins are available as patch points,
either pre or post processing. Likewise, when DIGITAL inputs are selected, the
ANALOG outs and ins are available as patch points. Cascade setups have the
patch point resource available mid - DSP as well. The OUT slider accesses the
patch points. Similar to a “half-normalled” patch bay on a mixing console, the
outputs are always active. Selecting a patch point effectively breaks the normal
and requires a return input in order for the unit to continue passing audio.
System Operation
OFMT (Digital Output Format)
This slider allows you to select AES (professional) or SPDIF (Sony/Phillips
Digital Interface) (consumer) as digital output formats.
Page 2 in the Control mode allows you to set the Analog I/O emphasis and deemphasis curves, the digital emphasis bit and the SCMS output bit. Only sliders
2, 5 and 6 are active.
ANA:EMPHDIG:EMPHSCM
ANA:EMPH (Analog emphasis)
Slider 2 sets analog emphasis and de-emphasis. This function is tied only to the
converters. As an example, if, when using the 300L as an A to D, you acoustically
set emphasis ON, make sure you set DIG: EMPH to YES with slider 5.
DIG: EMPH (Digital Output Emphasis bit)
Slider 5 sets the digital ouput emphasis bit ON or OFF. The top line indicates the
status of the digital input emphasis bit.
Page Two
Emphasis and SCMS
3-29
Page 61
300L Owner's Manual
Lexicon
SCM (Serial Copy Management System)
If you have selected S/PDIF as the output format, this slider will allow you select
from among three levels of Copy Protection. The choices are: MULTI-COPY,
ONE COPY, OR NO COPY. The factory default setting is MULTI-COPY.
Page Three
CopyProtect (on, off),
Bypass/Mute, Program
Load, Memory Purge
COPYBYPLOADPURGE
COPY PROTECT
Set this slider to OFF to allow copy functions to work. Select ON to protect
register locations. The factory default is ON.
BYP (Bypass)
This slider lets you determine the action of MUTE button: INPUT MUTE or
BYPASS DRY. In split Setups, the MUTE button affects both machines. With
INPUT MUTE selected, pressing the MUTE button will cause the message:
“AUDIO MUTED” to be displayed briefly. With BYPASS DRY selected, pressing
MUTE will cause the message: “AUDIO BYPASS” to be displayed. The factory
default setting is INPUT MUTE.
LOAD (Program Load)
This control allows you to determine to behavior of the 300L on program load:
BYPASS DRY or MUTE. The factory default is MUTE. Note: On configuration
changes, audio is muted regardless of selection.
PURGE
This slider allows you to perform five types of memory purges: Setup Registers,
Effect Registers, MIDI Map, Time Code Event List, or Total Purge. Select the
type of purge you want, then press STO to purge your selection. Be careful!
These functions permanently erase user information.
3-30
Page Four
Offline Copy Tools
Page 4 is an”offline” copy page that allows you to copy Setups, or Effects from
one location to another.
SETUP COPY - >SRCDEST
Slider 1 lets you to select Setups, or Effects to copy. You selection is shown on
both the upper and lower LARC display.
SRC (Source)
Depending on the selection made with Slider 1, the SRC slider scrolls through
all the Setup, and Effect locations. Presets are listed first, followed by Registers.
DEST (Destination)
This slider allows you to select the Register location where the copy will be
stored.
Page 62
AUTODMPDLYCHLCHLCHL
AUTO (Automation)
This slider allows you to specify mapping of MIDI non-registered parameters,
System Exclusive messages or Program Change messages from the 300L. The
button below the AUTO slider allows you to view the current MIDI Automation
mode. Advancing the slider scrolls through the four possible states: OFF, NonRegistered parameters, SysEx, and Program Change. When AUTO is set to
OFF, the 300L will not output MIDI data.
DMP (Dumps)
This slider allows you to select one of four types of Data dumps: All Registers,
Current Setup (including Effect), MIDI Map, and Time Code Event List. Select
the type of dump you want, then press the STOre key.
DLY (Dump Speed)
Slider 3 sets the effective speed of MIDI dumps. This function is designed to
facilitate dumps to receiving devices which cannot deal with vast amounts of
MIDI data coming inquickly. The choices are 2, 50, 100 and 200ms.
CHL (System Parameters MIDI Channel)
Selects the MIDI channel (1-16, OMNI) for System parameters, including all bulk
dump and SysEx messages, as well as Setup, Preset and Register recall.
System Operation
Page Five
MIDI: Automation, Dumps
and Channel Selection
CHL (Machine A MIDI Channel)
Selects the MIDI channel for Machine A: 1-16, OMNI
CHL (Machine B MIDI Channel)
Selects the MIDI channel for Machine B: 1-16, OMNI.
All generic MIDI and non-registered parameter messages follow the machine
channel assignment.
Page 6 is a dedicated page for selecting and making MIDI program maps.
MAPTYPESEL
MAP
Slider 1 selects a Map mode: OFF, FIXED, or MAP to any of the 128 MIDI Map
program slots. Setting this control to either OFF or FIXED, disables the TYPE
and SEL sliders — these sliders are active only when this control is set to one
of the 128 slot locations.
TYPE
Slider 3 selects Effect Machine A, Effect Machine B, or Setup for the current map
slot.
Page Six
MIDI: Maps
SEL (Select Table)
This slider scrolls the available choices for the type selected with slider 3 for the
current map slot. See Chapter 7 for additional MIDI information.
3-31
Page 63
300L Owner's Manual
Lexicon
Page Seven
Time Code:
Snap and View
Page Eight
Time Code: Event List
and Time Code
Edit/Add/Delete
This page provides the top level of control for Time Code Automation.
OFF
OFF
This slider selects Time Code modes: OFF (Time Code reception disabled),
VIEW (view the running event list), and SNAP (enter an event into the list). When
SNAP is selected, the button below the SNAP slider is active and will “snap”
entries into the list. (This occurs if time code is running or not).
CLR (Clear)
Pressing the button below the CLR slider will clear the last snapped event from
the list.
This page allows editing of the event list.
EDITTCTYPESEL
EDIT
Slider 1 lets you select any event to EDIT, ADD, or DELete from the event list.
Your selection is shown on the upper display.
TC (Time Code Offset)
Slider 2 allows you to adjust a plus or minus 4 second offset to the currently
displayed edit event (1-50). Pressing the button below the the TC slider drops
you into a sub page which allows you to enter a time code via the numeric keypad
or to assign Hours: Minutes: Seconds: and Frames via the associated sliders.
+ –H:M:S:F:EXIT
EXIT
Press the button under the EXIT slider to return to the Event Edit page.
TYPE
This slider selects between Setups and Effects for either Machine A or Machine
B, and parameter glides for MA:, MB:, or Setups.
SEL
The SEL slider allows you to select the actual Setup or Effect.
To return to the main Edit Page, press the button under the EDIT slider. For
additional information on Time Code, see Chapter 6.
3-32
Page 64
System Operation
This page provides the controls for setting the analog Input and Output Gains
before and after the converters. Only sliders 2 and 3 (LFT and RT input gain) and
sliders 5 and 6 (LFT and RT output gain) are active.
IN:LFTRTOUT:LFTRT
IN: LFT
Sets the input gain for the left channel
IN: RT
Sets the input gain for the right channel.
OUT: LFT
Sets the output gain for the left channel
OUT: RT
Sets the output gain for the right channel.
Page Nine
Input/Output Gains
3-33
Page 65
300L Owner's Manual
Lexicon
3-34
Page 66
The Algorithms and their Parameters
4
The Algorithms
and their
Parameters
4-1
Page 67
300L Owner's Manual
Single Setup
Algorithms
Random Hall
General Description
Lexicon
The 300L incorporates the results of a great deal of research into acoustics and
reverberation. Reverberation, or reflected sound energy, gives recorded music
a sense of being performed in a real acoustic location.
In the 300L, the Size, Spread and Shape controls allow adjustment of the buildup
and decay of the initial part of the reverberation envelope. Shape controls the
shape of the envelope, while Spread and Size set the time over which this shape
is active.
In the Random Hall program, Size acts as a master control for the apparent size
of the space being created by the 300L. Both Spread and Reverb Time vary
linearly
high settings of Size. To find an appropriate reverb sound, start with a preset with
a similar sound to what you want to end up with. Simply varying Size is often
sufficient to arrive at the exact sound you are seeking.
Once a size has been selected, Spread and Shape are used to adjust the shape
and duration of the initial reverb envelope, which together provide the major
sonic impression of room size.
with the setting of Size. Thus maximum reverb time and spread require
When SHAPE is at minimum, the reverberation envelope builds up very quickly
to a maximum amplitude, and then dies away quickly at a smooth rate. This
envelope is characteristic of small reverberation chambers and reverberation
plates. There are few (if any) size cues in this envelope, so it is ineffective in
creating ambience. With this Shape setting, Spread has no effect. The density
is set by the size control, and the rate of decay is set by Reverb Time. This
reverberation envelope is typical of many of the popular digital reverberators of
the last few years.
As Shape is raised to about 1/8 of its range, the initial sharp attack of the
reverberation is reduced, and reverberation builds more slowly. The envelope
then sustains briefly before it begins to die away at the rate set by Reverb Time.
Spread has little or no effect on this shape.
When Shape is at 1/4 of its range, buildup is even slower and the sustain is
longer. Now Spread affects the length of both the buildup and the sustain. As a
rough estimate, the sustain will be approximately the time value indicated by the
Spread display (in milliseconds).
As Shape is raised further, the buildup and sustain remain similar, but now a
secondary sustain appears in the envelope, at a lower level than the first. This
secondary plateau simulates a very diffused reflection off the back wall of a hall,
and is effective in creating a sense of size and space. This reflection becomes
stronger and stronger, reaching an optimal loudness when Shape is at about 1/
2 of its range.
4-2
The highest Shape settings are typically used for effects. Near the top of the
scale the back wall reflection becomes stronger than the earlier part of the
envelope, resulting in an inverse sound.
Page 68
Note that none of these shape effects are audible unless Reverb Time is set
short enough. Generally, Reverb Time should be set to a value of about 1.2
seconds for small rooms, and up to 2.4 seconds or so for halls. Size should also
be set to a value appropriate to the desired hall size (note, however, that small
sizes color the reverberation).15 meters makes a very small room, and 38
meters is useful for a large hall.
Used with care Shape and Spread allow the 300L to produce superior ambience—a sound which is spacious and has great depth—without the long
reverberation of a church.
The Algorithms and their Parameters
The Random Hall algorithm in the 300L incorporates random delay elements.
These elements have several effects. First, there is a reduction of long-lived
modes in the reverberant decay, which makes the decay less metallic and
reduces the apparent reverb time. The random elements also improve the
steady-state timbre of the program.
The speed at which the delay elements move is controlled by Spin. Values of
Spin which are higher than about 38 can cause audible pitch wobble in very
critical material (such as classical guitar or piano) and can also cause noise on
pure tones. This noise is not audible in speech, however, and, for mixed music
or speech, values up to 48 will give an improved sound. Wander is typically set
to about 10ms at larger settings of Size. Smaller values of Wander should be
used when smaller Sizes are used.
When you set out to create a sound, the first and most important decision is how
big a space you want. The best way to start is to listen to several presets and
choose the one which sounds closest to what you have in mind. If necessary, use
Size to make a slightly larger or smaller sound, as needed.
Next use Reverb Time to fine-tune the amount of time the reverberation takes
to die away at the end of musical phrases. Actual halls vary a great deal in their
actual Reverb Time values. The setting of Bass Multiply is also critical in
matching the sound of an existing hall. An ideal concert hall would have a Bass
Multiply setting of 1.2. It is rare when actual physical spaces exceed 1.5. Many
(if not most) good recording environments have values of Bass Multiply of 1.0 or
less, so a value of 0.8 could be tried when attempting to match an existing hall.
Random Delays
Creating a Realistic Sound
There are two additional controls to deal with. Shape and Spread adjust the
effective reverb time when the music is running. Higher values of Shape and
Spread produce a longer effective reverb time. Longer effective reverb times
give greater spaciousness to the sound.
The 300L reverberation algorithm offers the option of adding early reflections
(pre-echoes) which have been made into diffused clusters of pre-echoes. The
density of the cluster is set by the Diffusion control. We recommend that these
pre-echoes be used with caution, unless you are trying to match the sound of the
reverberation to a particular location where such reflections are strong.
0.2X-4.0X0.1-26.5KHZ0.5-21.2KHZ0-99LINK/UNLINKOFF, -48DB-UP FULL
PAGE THREE
SPNWANRTMSHLF
0-480µS-37.1MS.24-64.17SOFF, -48DB-UP FULL
PAGE FOUR
DL1LV1DL2LV2RTMRLVL
0-1000MS OFF-24.0DB-UP FULL0-1000MSOFF-24.0DB-UP FULL.02-64.17SOFF-48DB-UP FULL
PAGE FIVE
DL3LV3FB3DL4LV4FB4
0-2800MS OFF-24.0DB-UP FULL-93 TO +93%0-2800MSOFF-24.0DB-UP FULL-93 TO +93%
* Parameter ranges are dependent on settings of SIZ and LNK.
Lexicon
DiffusionPredelay
RTM (Mid-Frequency
Reverb Time)
Feedback 3
Σ
Σ
Delay 3Level 3
Delay 1
Reverberator
RTMSIZSHPSPR
XOVBASTDCLNK
SPN WAN SHLF
Delay 2
Feedback 4
Level 1
Level 2
R Level
Level 4Delay 4
Σ
High Frequency
Cutoff
Σ
Random Hall Page One
RTM sets the reverb time for mid-frequency signals. Because low-frequency
reverb time (BAS) is a multiplier of RTM, RTM acts as a master control for the
reverb time.
4-4
SHP (Shape)
SHP and SPR work together to control the overall ambience of the reverberation
created by the 300L. SHP determines the contour of the reverberation envelope.
With SHP all the way down, reverberation builds explosively, and decays
quickly.
Page 70
The Algorithms and their Parameters
SPR works together with SHP to control the duration of the initial ambience
created by the 300L. Low SPR settings result in a rapid onset of reverberation
at the beginning of the envelope, with little or no sustain. Higher settings spread
out both the buildup and sustain.
As SHP is advanced, reverberation builds up more slowly and sustains for the
time set by SPR. With SHP in the middle, the buildup and sustain of the
reverberation envelope emulates a large concert hall (assuming that SPR is at
least halfway up, and that SIZ is suitably large—30 meters or larger.)
SIZ sets the rate of buildup of diffusion after the initial period (which is controlled
by DIF). It also acts as a master control for RTM and SPR. The SIZ control
changes a reverb sound from very large to very small. Generally, you should set
the SIZ control to approximate the size of the acoustic space you are trying to
create, before adjusting anything else. The size in meters is roughly equal to the
longest dimension of the space. Moving SIZ while a signal is present may cause
audible transients on critical material.
The apparent size of the space created is actually a combination of the settings
of the SIZ, SHP, and SPR controls. Small acoustic spaces are characterized by
a rapid buildup of diffusion. However, both small and large spaces frequently
have an uneven buildup of initial reverberation. This uneven buildup is controlled
by the SPR and SHP controls.
SPR (Spread)
SIZ (Size)
HFC sets the frequency above which a 6 dB/octave low-pass filter attenuates the
processed signal. It attenuates both pre-echoes and reverberant sound. High
frequencies are often rolled off with this parameter, resulting in more natural
sounding reverberation. HFC is typically set betwen 2kHz and 6kHz.
PDLY adjusts an additional time delay between the input of signal and the onset
of reverberation. The control is not intended to mimic the time delays in natural
spaces. In real rooms the build-up of reverberation is gradual, and the initial time
gap is usually relatively short. Natural spaces are best emulated by setting SHP
at a middle value and adjusting SPR for the desired effective initial reverb
envelope.
Additional delay added with the PDLY control can increase the initial time gap
slightly, emulating a situation where reverberant pick-up microphones are
located much further from the source than the main microphones. If more than
about 30ms of pre-delay is added, this additional delay can add clarity with some
music, but it can also sound unnatural. Large pre-delays can be useful for slapecho effects.
* A quick "double-click" on the slider button will allow you to control this delay with
more resolution. To exit this "fine control" mode, double-click on the button
again.
HFC (High Frequency Cut)
PDLY (Predelay)*
4-5
Page 71
300L Owner's Manual
Lexicon
Random Hall Page Two
BAS (Bass Multiply)
XOV (Bass Crossover)
TDC (Treble Decay)
DIF (Diffusion)
BAS sets the reverb time for low-frequency signals, as a multiplier of the RTM
parameter. For example, if BAS is set to 2X, and RTM is set to two seconds, the
low frequency reverb time will be four seconds. For a natural-sounding hall
ambience, we recommend values of 1.5X or less.
XOV sets the frequency at which the transition from RTM to BAS takes place.
XOV should be set at least two octaves higher than the low frequency you want
to boost. For example, to boost a signal at 100 Hz, set XOV to 400 Hz (This
setting works well for classical music). XOV works best around 400 for boosting
low frequencies, and around 1.5 kHz for cutting low frequencies.
TDC sets the frequency above which sounds decay at a progressively faster
rate. It filters all the sound except the pre-echoes. When set relatively low, it gives
a darker tone to the reverberation, simulating the effect of air absorption in a real
hall. TDC also helps keep the ambience generated by the program from
muddying the direct sound.
DIF controls the degree to which initial echo density increases over time. High
settings of DIF result in high initial buildup of echo density, and low settings cause
low initial buildup. Echo density is also affected by SIZ; smaller spaces will sound
denser. To enhance percussion, use high settings of diffusion. For clearer and
more natural vocals, mixes, and piano music, use low or moderate settings of
diffusion.
LNK (Link)
RLVL (Reverb Level)
SPN (Spin)
WAN (Wander)
RTM (Mid-Frequency
Reverb Time)
When LNK is set, the reverb time and spread values scale linearly as the SIZ
control is varied. For some special effects, RTM and SPR can be unlinked.
RLVL sets the amount of reverberation in the processed signal. It is normally
FULL, but may be reduced for effects where the pre-echoes should dominate.
Random Hall Page Three
SPN affects the movement of the reverberation tail. The object of SPN (and
WAN) is to continuously alter the timbre of the reverberant sound. This makes
the result more natural, without making the position of instruments unstable.
SPN should typically be 20 or higher. High values may make the pitch of piano
or guitar unstable.
WAN sets the distance in time that the early reflections will move. For best results
WAN should be about 10ms at larger sizes, and 5ms for smaller sizes.
RTM sets the reverb time for mid-frequency signals. Because low-frequency
reverb time (BAS) is a multiplier of RTM, RTM acts as a master control for the
reverb time.
4-6
Page 72
The Algorithms and their Parameters
SHLF modifies the low-pass characteristic of the rolloff control, turning it into a
shelving filter. SHL sets the gain of an output path which is mixed with the output
of HFC to form the main reverberant output. Both the pre-echoes and the
reverberation are affected. For example, if SHLF is set to -6dB, frequencies
below approximately HFC/2 will be boosted by 3.5dB; above approximately HFC
x 2, the response will be flat.
SHLF provides a method for making the spectral content of the reverberation
match the ideal spectrum for musical acoustics in rooms. For this application,
HFC should be set between 700 and 1.5kHz, with SHLF set between -12 and
-6dB.
A note about Pre-Echoes
Pages Four and Five contain four pre-echo taps with delay and level controls.
The taps are fed directly to the output wet signal rather than into the reverberator.
Pre-echoes can best be understood by visualizing a stage where the early
reflections are the sounds emanating from the rear and side stage walls directly
after the sound from the stage. Usually the rear stage wall reflection is earlier and
louder than those from the two side walls. The pre-echoes are actually clusters
of echoes, with the density of the cluster set by DIF.
The pre-echo delay parameters change the perceived locations of reflecting
surfaces surrounding the source. Level adjusts the loudness of the reflection.
For each of the LV (Pre-echo level) parameters, there is a corresponding DL
(pre-echo delay) parameter. Each of these sets the delay time in ms for one of
the pre-echoes. These are not affected by PDLY, so pre-echoes can be placed
to occur before or after the reverberation starts.
SHLF
Random Hall Page Four
The DL pre-echo delay parameters have a resolution of 2 milliseconds.
The LV pre-echo level parameters have sixteen steps, calibrated in decibels.
The FB feedback parameters (for Delays 3 and 4 only) are adjustable in 6%
increments from -93% to +93%.
Pre-Echo 1, one second maximum to left channel.
Pre-Echo 2, one second maximum to right channel.
* A quick "double-click" on the DL1 or DL2 slider button will allow you to control
the delay with more resolution. To exit this fine control mode, double-click on the
button again.
RTM sets the reverb time for mid-frequency signals. Because low-frequency
reverb time (BAS) is a multiplier of RTM, RTM acts as a master control for the
reverb time.
DL1*, LV1
DL2*, LV2
RTM (Mid-Frequency
Reverb Time)
4-7
Page 73
300L Owner's Manual
Lexicon
RLVL (Reverb Level)
DL3*, LV3, FB3
DL4*, LV4, FB4
RLVL sets the amount of reverberation in the processed signal. It is normally
FULL, but may be reduced for effects where the pre-echoes should dominate.
Random Hall Page Five
Pre-Echo 3, 2.8 seconds maximum to left channel, with feedback.
Pre-Echo 4, 2.8 seconds maximum to right channel, with feedback.
* A quick "double-click" on the DL3 or DL4 slider button will allow you to control
the delay with more resolution. To exit this fine control mode, double-click on the
button again.
4-8
Page 74
The Algorithms and their Parameters
Random Ambience
The 300L's Random Hall effects are designed to add a cushion of reverberance
to recorded music, while leaving the clarity of the direct sound unaffected.
Random Ambience is different. It is intended to become a part of the direct sound
— to give it both better blend and a definite position in space. Random Ambience
gives warmth, spaciousness and depth to a performance without coloring the
direct sound at all.
Random Ambience generates primarily the strong reflections which appear in
the first few hundred milliseconds of the reverberation process. These early
reflections constitute the primary audible effect, giving you the impression of a
hall surrounding you while the music is playing. To avoid any coloration from
these strong reflections, the time delays and amplitudes are random functions.
Random Ambience is very useful for adding a room sound to recorded music or
speech. It is particularly easy to match a studio recording of dialog to a typical
room environment. In music recording, using Random Ambience is an effective
way of realistically adding distance to a close-miked signal. If an ensemble has
been recorded with close-mikes and pan pots, Ambience can provide the
missing blend and depth. The apparent position of the instruments is preserved
in the reverb while the apparent distance is increased. Random Ambience is
also useful in matching a closely miked accent microphone to the overall
ambience of a recording. This allows a soloist to be increased in level without
changing the apparent distance. Random Ambience can be used in a recording
situation any time a close-miked sound is undesireable.
General Description
Set Size to the desired room size. Reverb Level adjusts the amplitude of
reverberation defined by Reverb Time, and can be trimmed to get exactly the
effect you need.
To use the algorithm with a console, it is best to use a stereo send to the 300L,
carefully matching the panning of the various close-miked sources to their
positions in the mix. Leave the Mix control at 100%. The apparent distance of
each source can be controlled by the level of its feed.
4-9
Page 75
300L Owner's Manual
Random Ambience
Parameters
PAGE ONE
RT*RVLSIZROLDIFPDLY**
.24-64.17SECOFF, -48TO-1DB, UP FULL4.0-39.4M0.5KHZ-21.2KHZ0-990-99.877MS
PAGE TWO
SPNWANDDLY
0-480µS-37.1MS0-99.877MS
* Parameter range is dependent on setting of SIZ.
** Parameter range is dependent on setting of Sample Rate.
D Delay
Ambience Generator
Lexicon
L
R
DiffusionPredelay
D Delay
RT (Reverb Time)
RVL (Reverb Level)
SIZ (Size)
SIZRTM
SPN WAN
RLVL
Rolloff
Σ
Σ
Random Ambience Page One
This control adjusts the reverberation time of the independent reverberator. The
range of action is limited. Be careful — both long and short reverb times may
sound unnatural. If a much longer or shorter reverb time than the preset provides
is desired, SIZ should be changed first.
RVL sets the amount of reverberation in the processed signal. It should normally
be set between -6 and -12dB.
SIZ allows you to vary the apparent size of the space over a wide range. SIZ is
the most dramatic control, and must be selected to match the music or program
material. It should be the first control that you adjust to tailor the desired space.
SIZ also affects the reverb time, in a similar way to the standard reverb programs.
4-10
ROL (Hi Freq Rolloff)
ROL sets the frequency above which a 6 dB/octave low-pass filter attenuates the
processed signal. High frequencies are often rolled off with this parameter,
resulting in a more natural sounding acoustic space.
Page 76
The Algorithms and their Parameters
DIF controls the degree to which initial echo density increases over time. High
settings of DIF result in high initial buildup of echo density; low settings cause low
initial buildup. Echo density is also affected by SIZ; smaller spaces will sound
denser. To enhance percussion, use high settings of DIF. For clearer, more
natural vocals, mixes, and music, use low or moderate settings.
PDLY adds an additional delay to the reflections and to the reverberation. This
control may be useful in a sound reinforcement situation, or for ambience effects.
Random Ambience Page Two
SPN affects the movement of many of the delay taps. The object of SPN (and
WAN) is to continuously alter the timbre of the reverberant sound. This makes
the result more natural, without making the position of instruments unstable.
SPN should typically be 20 or higher. High values may make the pitch of piano
or guitar unstable.
WAN sets the distance in time that the early reflections will move. For best results
WAN should be about 10ms at larger sizes.
DIF (Diffusion)
PDLY (Pre-Delay)
SPN (Randomization)
WAN (Wander)
DDLY provides a delay for the "dry" audio path.
DDLY ( Dry Delay)
4-11
Page 77
300L Owner's Manual
Rich Plate
Lexicon
General Description
The Rich Plate program is denser, smoother, and more colored than other reverb
programs. When used with the SIZ control at around 16 meters, the sound is
dense and tight — ideal for percussion. Larger sizes and longer reverb times are
suitable for vocals and brass.
The Rich Plate program has five control pages with 28 adjustable parameters,
shown below.
0.2X-2.0X0.1-26.5KHZ0.5-21.2KHZ0-99LINK/UNLINKOFF, -48DB-UP FULL
PAGE THREE
RAN-DL1FB1DL2FB2
NONE, 1-98%,MAX-0-2000MS-60% TO 60%0-2000MS-60% TO 60%
PAGE FOUR
DL3LV3DL4LV4RTMRLVL
0-1000MSOFF-24.0DB, UP FULL0-1000MSOFF-24.0DB, UP FULL.24-64.17SECOFF, -48DB-UP FULL
PAGE FIVE
DL5LV5FB5DL6LV6FB6
0-2800MSOFF,-24.0DB-UP FULL-93% TO 93%0-2800MSOFF,-24.0DB-UP FULL-93% TO 93%
* Parameter ranges are dependent on settings of SIZ and LNK.
Feedback 1
Σ
Delay 1
Σ
DiffusionPredelay
Delay 3
Σ
Delay 2
Delay 4
Delay 5Level 5
Reverberator
RTMSIZSHPSPR
XOVBASTDCLNK
RAN
Σ
Feedback 2
4-12
Feedback 5
Feedback 6
Level 3
Level 4
R Level
Level 6Delay 6
Σ
High Frequency
Cutoff
Σ
Page 78
Rich Plate Page One
The Algorithms and their Parameters
This control adjusts the reverberation time of the independent reverberator. The
range of action is limited. Be careful — both long and short reverb times may
sound unnatural. If a much longer or shorter reverb time than the preset provides
is desired, SIZ should be changed first.
SHP and SPR work together to control the overall ambience of the reverberation
created by the 300L. SHP determines the contour of the reverberation envelope.
With SHP all the way down, reverberation builds explosively, and decays
quickly.
As SHP is advanced, reverberation builds up more slowly and sustains for the
time set by SPR. Plates characteristically have small values of SHP and SPR.
SPR works together with SHP to control the duration of the initial ambience
created by the 300L. Low SPR settings result in a rapid onset of reverberation
at the beginning of the envelope, with little or no sustain. Higher settings spread
out both the buildup and sustain.
SIZ allows you to vary the apparent size of the space over a wide range. SIZ is
the most dramatic control, and must be selected to match the music or program
material. It should be the first control that you adjust to tailor the desired space.
SIZ also affects the reverb time, in a similar way to the standard reverb programs.
RTM (Reverb Time)
SHP (Shape)
SPR (Spread)
SIZ (Size)
HFC sets the frequency above which a 6 dB/octave low-pass filter attenuates the
processed signal. It attenuates both pre-echoes and reverberant sound. High
frequencies are often rolled off with this parameter, resulting in more natural
sounding reverberation.
PDLY adds an additional delay to the reflections and to the reverberation. This
control may be useful in a sound reinforcement situation, or for ambience effects.
* A quick "double-click" on the slider button will allow you to control this delay with
more resolution. To exit this "fine control" mode, double-click on the button
again.
Rich Plate Page Two
BAS sets the reverb time for low-frequency signals, as a multiplier of the RTM
parameter. For example, if BAS is set to 2X, and RTM is set to two seconds, the
low frequency reverb time will be four seconds. For a natural-sounding plate
reverb, we recommend values of 1.0x or less.
HFC (High Frequency Cut)
PDLY* (Pre-Delay)
BAS (Bass Multiply)
4-13
Page 79
300L Owner's Manual
Lexicon
XOV (Bass Crossover)
TDC (Treble Decay)
DIF (Diffusion)
LNK (Link)
RLVL (Reverb Level)
XOV sets the frequency at which the transition from RTM to BAS takes place.
XOV should be set at least two octaves higher than the low frequency you want
to boost. For example, to reduce a signal at 100 Hz, set XOV to 400 Hz (This
setting works well for pop music).
TDC sets the frequency above which sounds decay at a progressively faster
rate. It filters all the sound except the pre-echoes. When set relatively low, it gives
a darker tone to the reverberation.
DIF controls the degree to which initial echo density increases over time. High
settings of DIF result in high initial buildup of echo density; low settings cause low
initial buildup. Echo density is also affected by SIZ; smaller sizes will sound
denser. To enhance percussion, use high settings of DIF. For clearer, more
natural vocals, mixes, and music, use moderate settings.
When LNK is set, the RTM and SPR values scale linearly as the SIZ control is
varied. For some special effects, RTM and SPR can be unlinked.
RLVL sets the amount of reverberation in the processed signal. It is normally
FULL, but may be reduced for effects where the pre-echoes should dominate.
RAN (Randomness)
DL1* , DL2*
FB1 , FB2
Rich Plate Pages Three, Four & Five
These pages provide control over three stereo delay pairs. All three are summed
with the output of the reverberator. Many, many different echo combinations are
possible.
RAN sets the rate of the randomization process. Plates should generally use low
amounts of randomization.
DL1 and DL2 (0ms-2000ms) are recirculating delay lines assigned to the left(1)
and right (2) channel inputs. The path of either is picked off after the diffusor with
the amount of recirculation defined by the adjustment of FB1 (for DL1) and FB2
(for DL2). DL1 and DL2 are the only delays which feed back (recirculate) into the
reverberator, as well as into the other delay lines.
* A quick "double-click" on the DL1 or DL2 slider button will allow you to control
the delay with more resolution. To exit this "fine control" mode, double-click on
the button again.
FB1 and FB2 determine the amount of recirculation passed back through to the
left and right inputs.
4-14
Page 80
The Algorithms and their Parameters
DL3 (0ms-1000ms) and DL4 (0ms-1000ms) are also picked off after the diffusor.
The level of each is controlled by LV3 and LV4, respectively.
* A quick "double-click" on the DL3 or DL4 slider button will allow you to control
the delay with more resolution. To exit this "fine control" mode, double-click on
the button again.
LV3 and LV4 determine the loudness of DL3 and DL4.
DL5 (0ms-2800ms) and DL6 (0ms-2800ms) allow you to build non-diffused
recirculating echoes independent of the reverberator. Each has a feedback
control (FB5 and FB6).
* A quick "double-click" on the DL5 or DL6 slider button will allow you to control
the delay with more resolution. To exit this "fine control" mode, double-click on
the button again.
FB5 and FB6 provide feedback control for DL5 and DL6.
LV5 and LV6 determine the loudness of DL5 and DL6. These are undiffused preechoes.
DL3* , DL4*
LV3, LV4
DL5* , DL6*
FB5, FB6
LV5, LV6
4-15
Page 81
300L Owner's Manual
Stereo Adjust
Lexicon
General Description
The Stereo Adjust algorithm offers fine adjustments of level and equalization
during digital mastering. Its stereo digital fader permits 0.25dB trimming and
provides full fades to digital zero at the end of a track. Its two sets of shelving
treble EQ can be set for different 3dB points and gains. BAS and SPEQ permit
adjustment of stereo width, enhancing the spaciousness and depth of the
recording.
Stereo Adjust
Parameters
PAGE ONE
OFF,-72.00DB TO +12.00DBL+3 TO R+3L+3 TO R+3CUT, -18 TO +6DBCUT, -18 TO +6DBCUT, -6.00 TO +6.00DB
OFF, ONOFF, ON +L+R,+L-R,+R+L,-R+LRESET, MANUAL, AUTO-99 TO +99%-99 TO +99%
PAGE FOUR
LDLLFBRDLRFB-SHUF
0-5000MS-99 TO +99%0-5000MS-99 TO +99%-0-10
PAGE FIVE
LFD*LFFRFD*RFF
0-10.417MS-99 TO +99%0-10.417MS-99 TO +99%
* Parameter ranges are dependent on setting of Sample Rate.
Sample
ΣΣ
Level
RFSBalanceRotate
ΣΣ
Stereo Adjust Page One
LVL (Master Level)
LVL is a stereo level control, with both channels equally attenuated or boosted.
From -12 to +12dB the fader moves in .25 dB increments. Below -12dB it moves
in .50 dB increments. Below -60 dB the calibration comes in larger steps, finally
dropping to zero output at -72 dB.
LFF
RFF
BXO
TXO
TXLR
Equalizer
BAS
TBL
DEMP
SPC
TBR
SHUF
L Delay
L/R Dly
R Delay
RFB
LFB
L Fine
R Fine
4-16
Page 82
The Algorithms and their Parameters
BAL implements a sine/cosine balance adjustment. Balance is smoothly adjusted over a wide range, with excellent resolution in the critical area around
zero. The display indicates the actual channel gains as the control is varied.
ROT is similar to BAL, but it treats stereo information somewhat differently. Any
signal panned to the center (mono) will be treated by ROT exactly as it would be
treated by BAL. However, if a signal is panned full right and the control is moved
toward the right, instead of simply being attenuated (as BAL would do) the right
channel is inverted in phase and added to the left channel. A stereo image
appears to rotate when this control is used. Ambient information is preserved,
and both channels appear to retain equal loudness.
If stereo material is recorded with a coincident pair of figure-of-eight microphones, moving the ROT slider is exactly equivalent to rotating the microphone
pair. Other microphone arrays and multimicrophone setups do not rotate
perfectly, but using this control is frequently preferable to simply adjusting
balance. The display shows the actual channel gains for a continually panned
source.
BAS is a 6dB/octave shelving EQ control with a range of +6 dB boost and -18dB
cut. It moves in .5 dB steps from +6 to -6 dB. The crossover point is adjusted with
BXO. BAS acts on both stereo channels equally.
BAL (Balance)
ROT (Rotate)
BAS (Bass EQ)
TRB is a 6 dB/octave shelving EQ controls with a range of +6 dB boost and -18dB
cut. It moves in .50 dB steps from +6 to -6 dB. The crossover point is adjusted
with TXO. TRB acts on both stereo channels equally.
SPEQ sets the amount of a crossfeed between channels. The signal first goes
through a 6 dB/octave low-pass filter whose frequency is set with BXO.
When SPEQ is set positive (above 0) the crossfeed has a negative sign. When
SPEQ is set negative (below 0), the crossfeed has a positive sign. When the
control is set to either maximum or minimum, the gain in the crossfeed circuit is
unity.
The result of this control is to change the separation of low frequency stereo
signals. When the control is raised, low frequencies in the sum (mono) channel
are reduced, and low frequencies in the difference (stereo) channel are raised.
With the control at maximum, low frequency mono signals are completely
removed. This represents an extreme setting which should seldom be needed
in practice.
With material which has stereo bass information, or which contains some
reverberation, the effect of raising SPEQ is to increase the sense of spaciousness and depth of the sound. It is particularly useful on material recorded with
panpots, or coincident and semi-coincident microphone technique.
TRB (Treble EQ)
SPEQ (Spatial EQ)
When most of the bass in a recording is in the sum (mono) channel, raising
SPEQ may reduce the bass level. This effect can be compensated for by raising
the overall bass level with BAS. Since both controls use the same BXO setting,
4-17
Page 83
300L Owner's Manual
Lexicon
this compensation will be quite accurate as long as SPEQ is set to less than 3
dB boost.
Stereo Adjust Page Two
DLY (Master Delay)
BXO (Bass Crossover)
TXO (High Frequency
Cutoff)
TXLR (Independent
Treble Crossover)
TBL, TBR (Independent
Treble Boost/Cut)
DLY controls a 5-second stereo delay line, with coarse resolution. Separate
mono and fine controls are on Page Five. This is a post-processing full-level
delay, and is always in the circuit. This is a ganged stereo control with the display
showing both left and right delay values.
BXO sets the crossover point for BAS. When BAS is set to full cut, the level is
-3 dB at the frequency set with BXO.
TXO sets the crossover point for TRB. When TRB is set to full cut, the level is
-3 dB at the frequency set with this control.
TXLR sets the crossover point for TBL and TBR. When either is set to full cut,
the level is -3 dB at the frequency set with this control.
These controls allow independent adjustment of left and right treble. They may
be used together with the stereo adjustments to create a 12 dB/octave cut or
boost. Note that the 3 dB frequencies can be different from the stereo set.
Stereo Adjust Page Three
SAM (1/2 sample)
(De-emphasis On/Off)
4-18
DEMP
When this control is on, the left channel is delayed relative to the right by 11µsec
(1/2 sample). This control specifically corrects for the timing error between
channels caused by consumer digital systems (e.g. the Sony PCM-F1 and its
progeny) that time-share single analog converters. Turning on this delay time
aligns the left channel audio data for compatibility with professional systems.
When DEMP is On, the incoming signal is digitally de-emphasized. This should
not be used unless the material has been emphasized in the record process—
such as a PCM-F1 tape. Note that the emphasis bit in the incoming signal can
be turned off from Control Mode, Page Five, Slider 2.
When digital de-emphasis is applied, the CD mastering lab must be informed
that the tape is not emphasized, and the CD emphasis bit should be manually
set to Off. Mastering labs are happy to do this, but they
must
be informed!
Page 84
The Algorithms and their Parameters
RFS is used for digitally correcting problems you used to be able to fix (or create)
by switching analog cables around. The normal setting is +L to the left output and
+R to the right output. Other settings should only be used when correcting some
problem created previously in the recording process.
+L+R = Normal Routing
+L-R = Right Channel polarity inverted (flipped)
+R+L = Left and Right Channels swapped
-R+L = Right flipped and swapped with Left
This control provides three choices: RESET, MANUAL ADJUST and AUTO
ADJUST. RESET disables all DC adjustment. AUTO ADJUST enables routines
for correcting DC offset from material recorded through analog-to-digital converters that are not properly trimmed for DC. MANUAL ADJUST allows slider
selection of offset values.
Replaces any previously obtained value with the value set here via the slider.
The display indicates the percent of the correction.
Stereo Adjust Pages Four and Five
These pages provide controls to give individual channel control over the 5second post-equalization delay line.
RFS (Right Channel
Flip 'n' Swap)
DC (DC Offset Nulling)
DCL and DCR
(Left and Right Channel
DC Offset)
5-second mono control in coarse steps for the left channel. DLY + LDL must not
total more than 5,000 milliseconds.
* A quick "double-click" on the slider button will allow you to control this delay with
double the resolution. To exit this fine contro" mode, double-click on the button
again.
5-second mono control in coarse steps for the right channel. DLY + RDL must
not total more than 5,000 milliseconds.
* A quick "double-click" on the slider button will allow you to control this delay with
double the resolution. To exit this fine control mode, double-click on the button
again.
LDL*
(Left Channel Coarse)
RDL*
(Right Channel Coarse)
4-19
Page 85
300L Owner's Manual
Lexicon
Fine Sample Delays
These can be used for subtle time alignment adjustments. The 300L will correctly
display the resulting time shift as a function of the sampling rate. As many as 500
samples can be added to any stereo/coarse delay setting for a maximum
possible delay per channel of 5 seconds + 500 samples.
48 kHz = 20.833 microseconds per sample
44.1 kHz = 22.676 microseconds per sample
LFD* (Left Channel Fine)
RFD* (Right Channel Fine)
LFB, RFB, LFF and RFF
500-sample, 2 samples per step, mono fine adjust for the left channel.
* A quick "double-click" of the slider button will allow you to control the delay in
single sample increments. To exit the extra-fine mode, double-click on the slider
button.
500-sample, 2 samples per step, mono fine adjust for the right channel.
* A quick "double-click" of the slider button will allow you to control the delay in
single sample increments. To exit the extra-fine mode, double-click on the slider
button.
Two feedback paths are available per channel: overall and fine. Overall
feedback is the total delay of DLY + L(R)DL + L(R)FD, and is useful for long echo
effects.
Fine Feedback (LFF and RFF) is only around the Fine Delay and can be used
for very short delay effects and coloration.
All feedback gains are adjustable in 1% increments from -99% to +99%. If the
magnitudes of both feedback gains for a channel sum to more than 100%, that
channel will overload.
4-20
On the 300L, overall and fine are differentiated by the following labels:
LFB = Overall Left Channel Feedback
LFF = Fine Left Channel Feedback
RFB = Overall Right Channel Feedback
RFF = Fine Right Channel Feedback
Page 86
The Algorithms and their Parameters
SHUF controls a spatial equalizer designed to make recordings from a dummy
head, or closely-spaced omni microphones, more suitable for loudspeaker
reproduction. Due to the close spacing of the microphones, there is very little
difference between the two stereo channels below about 300Hz. The shuffler
restores the low frequency separation by first matrixing the L and R signals into
L+R and L-R, bass-boosting the L-R channel, then rematrixing back to L and R.
The effect is to convert small time differences (which are not audible in
loudspeaker reproduction) between the two microphones into level differences,
which are audible. The effect can be dramatic.
The frequency below which the boost acts is set by the SHUF control. A setting
of 5 will give a 3dB L-R boost at about 150Hz; a setting of 10 will be 3dB up at
250Hz. Response rises at 6dB/octave below this frequency. More than 18dB of
gain can be obtained at 20Hz when SHUF is set to 10.
This control has been optimized for true binaural recordings, where the difference signal at low frequencies is minimal. If it is used on ordinary stereo material,
or with binaural material to which reverberation has been added, excessive low
frequency difference signals can result. On such material, it is better to use the
SPEQ control which will achieve a similar result.
The SHUF control varies from 0 (shuffler off) to a maximum of 10. While theory
would suggest a setting of 10 for a dummy head, a setting of 5 appears to be more
useful in practice. The setting is very much a matter of taste. If closely spaced
microphones are used, the setting will scale inversely with the microphone
distance in centimeters. For a spacing of 15cm, try a shuffler setting of 5. For a
spacing of 30cm, try a setting of 3. For a spacing of 7cm, try a setting of 10.
SHUF (Binaural Shuffler)
4-21
Page 87
300L Owner's Manual
Stereo Pitch Shift
Lexicon
General Description
Stereo Pitch Shift is a stereo or two-channel mono pitch shifter with several
useful effects, including delay, feedback, and glide. These are independently
adjustable for each channel. The pitch shifter in the 300L includes a pitch
detection feature which automatically adjusts the period of the splices to match
the pitch of incoming signals. This feature greatly reduces the artifacts associated with pitch shift. In stereo mode both channels are linked, and the sum of the
two channels (L & R) is used in the pitch detector. In mono mode each channel
splices independently. In either case it takes about 40 ms for the pitch detector
to obtain an optimal pitch value. Setting the LDL and RDL controls to this value
will give the smoothest pitch shift. Shorter values can be used for special effects,
or when extra delay cannot be tolerated.
There are two interacting controls for pitch described below: Pitch Interval, and
Fine Pitch. Adjusting any pitch control activates a display that shows the musical
interval, and any fine adjustment in cents.
Stereo Pitch
Shift Parameters
PAGE ONE
MODSNCPCHFINPCHFIN
MONO/STEREOOFF/ON-2 OCT TO +MAJ7+96¢-2 OCT TO +MAJ7+96¢
PAGE TWO
LDLFBLRDLFBR-BNPS
0-510MSNONE-98%, MAX0-510MSNONE-98%, MAX-OFF/ON
4-22
BandpassSyncMode
Mono or
Stereo
Feedback
Shifter
Σ
Σ
PCHFIN
Shifter
PCHFIN
Feedback
L Delay
R Delay
Page 88
Stereo Pitch Shift Page One
The Algorithms and their Parameters
MOD selects stereo or mono mode. In stereo the two channels are linked, pitch
shifting by the same amount and splicing at the same time.
SNC is only active in Stereo mode. This control forces an exact sync of the two
channels when the control is turned from Off to On. When SNC is On, there is
an automatic re-syncing any time the two channels differ in phase by about 10
samples. This can occur if PCH, LDL, or RDL is changed. Re-syncing can cause
a small click in the output. If the pitch shifter is being used to manually pitchcorrect classical music, it may be better to set SNC to Off. There is an automatic
sync tracking feature which will keep the two channels locked to within 2
samples. If precise synchronization is desired, the LDL and RDL controls should
be set to the same value, SNC should be set from On, and then the pitch should
not be changed. The two channels will remain precisely synchronized, even
though both are continually changing the splice length in response to the
incoming pitches.
The leftmost PCH control adjusts the pitch interval of both channels in stereo
mode, and the left channel in mono mode. The second PCH control is only active
in mono mode, where it adjusts the right channel. The exact tuning can be altered
by the fine pitch control, and the exact pitch shift in intervals and cents is
displayed. The fine control must be set to the exact middle of its range if perfect
pitch intervals are to be obtained.
MOD (Mode)
SNC (Synchronization)
PCH (Pitch Interval)
In the long display, Fine Pitch is shown by the number of cents added to, or
subtracted from, the semitone intervals. Remember that Pitch Interval will
produce exact intervals only if Fine Pitch is centered.
The leftmost FIN control acts on both channels together in stereo mode, and the
left channel in mono mode. It adjusts pitch continuously over a range of a few
hundred cents, and is additive to the PCH controls. If PCH is set to the middle
of its range the leftmost FIN control can be used to set very small values of pitch
shift, producing a chorusing effect.
The second FIN control is only active in mono mode, where it adjusts the right
channel.
Stereo Pitch Shift Page Two
LDL adjusts the length of a delay line in series with the left input. The range is
zero to 510ms in 2ms steps.It also affects the delay of any feedback which is
applied. In stereo mode the two delays must be set to the same value, or the
signals will not be in phase. Optimal pitch shift occurs when LDL is about 40ms.
RDL is the same as LDL, except that it affects the right channel.
FIN (Fine Pitch)
LDL, RDL (Left and Right
Delays)
4-23
Page 89
300L Owner's Manual
Lexicon
FBL, FBR (Left and Right
Feedback)
BNPS (Bandpass Filter)
FBL and FBR control the amount of positive feedback from the output of the echo
delay line to the input of the pitch shifter. The control is adjustable from 0 to +99%.
Some very useful arpeggiated effects can be obtained by combining pitch shift,
delay, and feedback.
BNPS is a bandpass filter which rolls off the frequency responce of the audio
before the splicing algorithm. The -3dB point is 100 Hz. The purpose of the bandpass filter is to give the pitch shifter
less
information than it actually needs to
decide when to make the splice. Typically, this will improve the performance of
the pitch shifter, especially for vocal applications.
4-24
Page 90
The Algorithms and their Parameters
"Split" Setup
Algorithms
Dual Delays
The Dual Delay algorithm consists of 2 types of delay lines: Gliding Flange
delays and Fixed delays. This is a true stereo algorithm. (If run in a Dual Mono
Setup, however, it will be mono.)
Two independent flange base delays are available, each with a 20ms range in
single sample steps. There is also a ganged stereo gliding flange delay. There
are two flange gain controls which vary the overall amount of flange effect.
The stereo gliding flange delay is typically modulated by the internal LFO. Setting
the flange gains very high will cause an “over the top” type of flange to occur as
the flange glide delays cross over the base delay pointers. The outputs of the
flange delays are fed to the delay left and delay right lines which are 2.5 seconds
long. Once into these delay lines, you can create many different delay effects.
There are two programmable taps on each delay line. DL1 (left) and DL2 (right)
can be programmed anywhere along this 2.5 second path. There will, however,
be no apparant delay unless a feedback value is assigned to the delay values
via FB1 and FB2. All Pass filters, or diffusors, in line with the feedback paths are
labeled APD1 (All Pass Delay) and APD2. The amount of diffusion is set by AP1
and AP2. When AP is turned high and FB1 is adjusted away from the 0% value,
each feedback loop will be rediffused.
DL3 and DL4 are cross feedback delay lines. They are also adjustable anywhere
along the 2.5 second delay line. DL3 feeds from the left delay position to the input
of the right delay line. The same is true with DL4 feeding into the left delay line.
The feedback parameters adjust the amount (level) passed into the destination
delay lines.
General Description
The last pair of delay pointers (LDL and RDL) can be thought of as independently
adjustable post delays. These can be adjusted anywhere along the 2.5 second
delay line.
The output of each delay line can be positioned anywhere in the stereo pan field.
LPAN adjusts the position of the left delay loop; RPAN positions the output of the
right delay loop.
Note: The intensity of the OVER THE TOP and ENVELOPE presets can be
increased by sending the effect a "prefade" signal from your console.
4-25
Page 91
300L Owner's Manual
Dual Delays
Parameters
PAGE ONE
FDL*FBD*FBD*LFGRFG
0-19.947MS0-19.947MS0-19.947MS-99% TO +99%-99% TO +99%
PAGE TWO
DL1*FB1DL2*FB2
0-2498.917MS-99% TO +99%0-2498.917MS0-99%
PAGE THREE
AP1APD1*-AP2APD2*
0-1910-9.963MS-0-1910-9.963MS
PAGE FOUR
DL3*FB3DL4*FB4
0-2498.917MS-99% TO +99%0-2498.917MS-99% TO +99%
PAGE FIVE
LDL*LPAN-RDL*RPAN
0-2498.917MSL, 0-98%R/L, R0-2498.917MSL, 0-98%R/L, R
* Parameter ranges are dependent on setting of Sample Rate.
Lexicon
Flanger
FBD
FBD
LFG
FDL
FDL
RFG
Σ
Σ
FDL (Flange Delay)
FBD (Left and Right Flange
Base Delays)
LFG and RFG (Left and
Right Flange Gain)
AP 1APD 1FB 1
Σ
Σ
Delay 1
Delay 2
AP 2APD 2FB 2
Delay 3L DelayL Pan
FB 3
FB 4
Delay 4R DelayR Pan
Σ
Dual Delays Page One
FDL is a separate 20 ms ganged gliding stereo delay line.
The FBD controls are base delays which get summed with the stereo ganged
flange delay.These base delays are adjustable throughout a 20 millisecond
range.
LFG and RFG are flange gains which are adjustabe as a feed forward amplifier
loop (+99% positive value) or feedback amplifier loop (-99% negative value).
Σ
4-26
Page 92
Dual Delays Page Two
The Algorithms and their Parameters
DL1 and DL2 set the delay values for the respective left to left and right to right
feedback loops
* A quick "double-click" on the DL1 or DL 2 slider button will allow you to control
the delay with more resolution. To exit this fine control mode, double-click on the
button again.
FB1 and FB2 set the gain of feedback for each of the delay lines. Available values
range from -99% to +99% gain.
Dual Delays Page Three
APD1 and APD2 are diffusors (All Pass Delays) in series with the feedback loops
associated with DL1 and DL2. Their controls range from 0 to 10 ms. These
controls essentially “tune” the diffusor delay line.
AP1 and AP2 are gains associated with the diffusors. You can think of them as
controlling the amount of diffusion.
Dual Delays Page Four
DL1*, DL2*
FB1, FB2
APD1, APD2 (All Pass Left
and Right Delays)
AP1, AP 2 (All Pass Left
and Right Gain)
DL3 controls the delay time which cross-feedbacks to the input of DL2. DL4
controls the delay time which cross-feedbacks to the input of DL1.
* A quick "double-click" on the DL3 or DL 4 slider button will allow you to control
the delay with more resolution. To exit this fine control mode, double-click on the
button again.
FB3 and FB4 control the gain of the cross- feedbacks going with each of their
respective delay lines.
Dual Delays Page Five
LDL sets the left channel delay line's time. RDL sets the right channel delay line's
time.
* A quick "double-click" on the LDL or RDL slider button will allow you to control
the delay with more resolution. To exit this fine control mode, double-click on the
button again.
LPAN adjusts the left delay channel pan placement. RPAN adjusts the right
delay channel pan placement
DL3*, DL 4*
FB3, FB4
LDL*, RDL*
LPAN, RPAN
4-27
Page 93
300L Owner's Manual
Chamber
Lexicon
General Description
The Chamber program provides several presets which can be loaded into any
Dual Mono or Cascade setup. In the Dual Mono setups it passes audio Mono InMono Out. In the Cascade setups, audio is routed Mono In-Stereo Out. The
Chamber program can simulate many different types of acoustic spaces or
mechanical devices.
The Chamber algorithm is great on anything. Sizes of 25 and larger set a lower
acoustic density. SHP and SPR help create the illusion of larger spaces while
using short reverb times. As in the Random Hall algorithm, the LNK parameter
couples SIZ to the RTM and SPR. Unlink provides a method of setting stable
RTM and SPR values, then adjusting SIZ to set the right density and “tuning”.
Chamber is bright by design, so you may want to use lower values of RTC —
maybe even as low as 1.0kHz or 500Hz.
The randomization circuit in Chamber is designed to reduce coloration and/or
frequency nodes caused by low frequency input. If you want to create your own
special Chambers or Halls, you should keep RAN set to 80 or 90.
Typically, SIZs of 14-24 meters with RTCs higher than 3.4kHz will emulate bright
sounding metal plates. Remember to set SHP and SPD to extremely low values
to maintain the explosiveness of the reverb decay. Because plates are very
diffuse, any preset mimicking a plate should have DIF set relatively high (70-80),
while BAS is kept to some value less than 1.2kHz.
DIF and PDL precede the reverberator. When Chamber programs are loaded
into Dual Mono setups, the audio will be Mono In-Mono Out. When loaded into
Cascade setups, audio is routed summed Mono In-Stereo Out.
* Parameter ranges are dependent on settings of SIZ and LNK.
4-28
RANDIFSHPSPR*LNK
Split Chamber
RTMSIZSHPSPR
Σ
Diffusion
Predelay
XOVBASTDCLNK
RAN
Page 94
Chamber Page One
The Algorithms and their Parameters
RTM sets the reverb time for mid-frequency signals. Because BAS is a multiplier
of RTM, RTM acts as a master control for the reverb time.
BAS sets the reverb time for low-frequency signals, as a multiplier of the RTM
parameter. For example, if BAS is set to 2x, and RTM is set to two seconds, the
low frequency reverb time will be four seconds. For a natural-sounding hall
ambience, we recommend values of 1.2x or less.
XOV sets the frequency at which the transition from RTM to BAS takes place.
XOV should be set at least two octaves higher than the low frequency you want
to boost. For example, to boost a signal at 100 Hz, set XOV to 400 Hz (This
setting works well for classical music). XOV works best around 400 for boosting
low frequencies, and around 1.5 kHz for cutting low frequencies.
SIZ sets the rate of buildup of diffusion after the initial period (which is controlled
by DIF). It also acts as a master control for RTM and SPR. The SIZ control
changes a reverb sound from very large to very small. Generally, you should set
the SIZ control to approximate the size of the acoustic space you are trying to
create, before adjusting anything else. The size in meters is roughly equal to the
longest dimension of the space. Moving SIZ while a signal is present may cause
audible transients on critical material.
RTM (Mid-Frequency
Reverb Time)
BAS (Bass Multiply)
XOV (Bass Crossover)
SIZ (Size)
The apparent size of the space created is actually a combination of the settings
of the SIZ, SHP, and SPR controls. Small acoustic spaces are characterized by
a rapid buildup of diffusion. However, both small and large spaces frequently
have an uneven buildup of initial reverberation. This uneven buildup is controlled
by the SPR and SHP controls.
TDC sets the frequency above which sounds decay at a progressively faster
rate. When set relatively low, it gives a darker tone to the reverberation,
simulating the effect of air absorption in a real hall. TDC also helps keep the
ambience generated by the program from muddying the direct sound.
PDLY adjusts an additional time delay between the input of signal and the onset
of reverberation. The control is not intended to mimic the time delays in natural
spaces. In real rooms the build-up of reverberation is gradual, and the initial time
gap is usually relatively short. Natural spaces are best emulated by setting SHP
at a middle value and adjusting SPR for the desired initial reverb envelope.
Additional delay added with the PDLY control can increase the initial time gap
slightly, emulating a situation where reverberant pick-up microphones are
located much further from the source than the main microphones. If more than
TDC (Reverb Treble Cutoff)
PDLY* (Pre-Delay)
4-29
Page 95
300L Owner's Manual
Lexicon
about 30ms of pre-delay is added, this additional delay can add clarity with some
music, but it can also sound unnatural. Large pre-delays can be useful for slapecho effects on vocal tracks.
* A quick "double-click" on the slider button will allow you to control this delay with
more resolution. To exit this fine control mode, double-click on the button again.
Chamber Page Two
RAN (Randomization)
DIF (Diffusion)
SHP (Shape)
SPR (Spread)
RAN sets the amount of randomization within the reverb process. Acoustically
it is similar to the Spin control in Random Hall.
DIF controls the degree to which initial echo density increases over time. High
settings of DIF result in high initial buildup of echo density; low settings cause low
initial buildup. Echo density is also affected by SIZ; smaller spaces will sound
denser. To enhance percussion, use high settings of DIF. For clearer, more
natural vocals, mixes, and music, use low or moderate settings.
SHP and SPR work together to control the overall ambience of the reverberation
created by the 300L. SHP determines the contour of the reverberation envelope.
With SHP all the way down, reverberation builds explosively, and decays
quickly.
As SHP is advanced, reverberation builds up more slowly and sustains for the
time set by SPD. With SHP in the middle, the buildup and sustain of the
reverberation envelope emulates a large concert hall (assuming that SPR is at
least halfway up, and that SIZ is suitably large—30 meters or larger.)
SPR works together with SHP to control the duration of the initial ambience
created by the 300L. Low SPR settings result in a rapid onset of reverberation
at the beginning of the envelope, with little or no sustain. Higher settings spread
out both the buildup and sustain.
4-30
LNK (Link)
When LNK is set, the reverb time and spread values scale linearly as the SIZ
control is varied. For some special effects, RTM and SPR can be unlinked.
Page 96
The Algorithms and their Parameters
Mono Pitch Shift
The Mono Pitch Shift Algorithm has several useful effects, including delay,
General Description
feedback, and glide. The pitch shifter in the 300L includes a pitch detection
feature which automatically adjusts the period of the splices to match the pitch
of incoming signals. This feature makes the splicing intelligent, and greatly
reduces the artifacts associated with pitch shift. It takes about 40 ms for the pitch
detector to obtain an optimal pitch value. Setting the DLY control to this value will
give the smoothest pitch shift. Shorter values can be used for special effects, or
when extra delay cannot be tolerated.
There are two interacting controls for pitch described below: Pitch Interval, and
Fine Pitch. Adjusting any pitch control activates a display that shows the musical
interval, and any fine adjustment in cents.
Mono Pitch Shift
Parameters
PAGE ONE
PCHFINDLYFBK-BNPS
-2OCT TO MAJ7+96¢0-510MSNONE-98%, MAX-OFF/ON
Feedback
Shifter
Bandpass
Σ
PCHFIN
Delay
Mono Pitch Shift Page One
PCH adjusts pitch interval. The exact tuning can be altered by FIN, and the exact
pitch shift in intervals and cents is displayed. FIN must be set to the exact middle
of its range if perfect pitch intervals are to be obtained. Fine pitch is shown by the
number of cents added to, or subtracted from, the semitone intervals. Remember that PCH will produce exact intervals only if FIN is centered.
FIN adjusts pitch continuously over a range of a few hundred cents, and is
additive or subtractive to the PCH control.
DLY adjusts the length of a delay line from zero to 510ms in 2ms steps.Optimal
pitch shift occurs when DLY is about 40ms.
FBK controls the amount of positive feedback from the output of the delay line
to the input of the pitch shifter. The control is adjustable from 0 to +99%. Some
very useful arpeggiated effects can be obtained by combining pitch shift, delay,
and feedback.
PCH
FIN
DLY
FBK
4-31
Page 97
300L Owner's Manual
BNPS
Lexicon
BPS is a band-pass filter which rolls off the frequency responce of the audio
before the splicing algorithm. The -3dB point is 100 Hz. The purpose of the bandpass filter is to give the pitch shifter
less
information than it actually needs to
decide when to make the splice. Typically, this will further improve the performance of the pitch shifter.
4-32
Page 98
The Algorithms and their Parameters
Small Stereo
Adjust
The Small Stereo Adjust algorithm is a scaled-down version of Stereo Adjust with
General Description
some of the specialized features omitted. It is designed to be put in Cascade
Setups ahead of PONS or Compressors.
Small Stereo Adjust
Parameters
PAGE ONE
OFF, -72.05DB TO +12DBL+3 TO R+3CUT, -18DB - +6DBCUT, -18DB - +6DB0.1-26.5KHZ CUT, -6.00 TO +6.00DB
MSTBALBASBASBXOSPEQ
PAGE TWO
TXOTBLTBRROT
0.1-26.5KHZCUT, -18DB - +6DB CUT, -18DB - +6DBL+3 TO R+3
Equalizer
BASBASBXO
MasterBalanceRotate
TBLTBRTXO
SPEQ
Stereo Adjustments Page One
MST is a stereo level control, with both channels equally attenuated or boosted.
From -12 to +12dB the fader moves in .25 dB increments. Below -12dB it moves
in .50 dB increments. Below -60dB the calibration comes in larger steps, finally
dropping to zero output at -72dB.
BAL implements a sine/cosine balance adjustment. Balance is smoothly adjusted over a wide range, with excellent resolution in the critical area around
zero. The display indicates the actual channel gains as the control is varied.
These are 6dB/octave shelving EQ controls with a range of +6 dB boost and 18dB cut. They move in .50 dB steps from +6 to -6 dB. The crossover point is
adjusted with TXO.
BXO sets the crossover point for the BAS controls. When these are set to full
cut, the level is -3 dB at the frequency set with BXO.
MST (Master Fader)
BAL (Balance)
BAS (EQ Shelving)
BXO (Bass Crossover)
4-33
Page 99
300L Owner's Manual
Lexicon
SPEQ (Spatial EQ)
SPEQ sets the amount of a crossfeed between channels. The signal first goes
through a 6 dB/octave low-pass filter whose frequency is set with BXO. When
SPEQ is set positive (above 0) the crossfeed has a negative sign. When SPEQ
is set negative (below 0), the crossfeed has a positive sign. When the control is
set to either maximum or minimum, the gain in the crossfeed circuit is unity.
The result of this control is to change the separation of low frequency stereo
signals. When the control is raised, low frequencies in the sum (mono) channel
are reduced, and low frequencies in the difference (stereo) channel are raised.
With the control at maximum, low frequency mono signals are completely
removed. This represents an extreme setting which should seldom be needed
in practice.
With material which has stereo bass information, or which contains some
reverberation, the effect of raising SPEQ is to increase the sense of spaciousness and depth of the sound. It is particularly useful on material recorded with
panpots, or coincident and semi-coincident microphone technique.
When most of the bass in a recording is in the sum (mono) channel, raising
SPEQ may reduce the bass level. This effect can be compensated for by raising
the overall bass level with the BAS controls. Since both controls use the same
BXO setting, this compensation will be quite accurate as long as SPEQ is set to
less than 3 dB boost.
TXO (Independent
Treble Crossover)
TBL, TBR (Left and Right
Treble Boost/Cut)
ROT (Rotate)
Small stereo Adjust Page Two
TXO sets the crossover point for TBL and TBR. When either is set to full cut,
the level is -3 dB at the frequency set with TXO.
These controls allow independent adjustment of left and right treble.
ROT is similar to BAL, but it treats stereo information somewhat differently. Any
signal panned to the center (mono) will be treated by ROT exactly as it would be
treated by BAL. However, if a signal is panned full right and the control is moved
toward the right, instead of simply being attenuated (as BAL would do) the right
channel is inverted in phase and added to the left channel. A stereo image
appears to rotate when this control is used. Ambient information is preserved
and both channels appear to retain equal loudness.
If stereo material is recorded with a coincident pair of figure-of-eight microphones, moving the ROT slider is exactly equivalent to rotating the microphone
pair. Other microphone arrays and multimicrophone setups do not rotate
perfectly, but using this control is frequently preferable to simply adjusting
balance. The display shows the actual channel gains for a continually panned
source.
4-34
Page 100
The Algorithms and their Parameters
Compressor
The Compressor algorithm is a true digital compressor which will run in either
Dual Mono or Cascade Setups. In Dual Mono Setups, it configures to mono in
mono out; in Cascade Setups it configures as a true stereo effect. The
compressor can be described as an upwards averaging compressor. Digital
compressors, like analog compressors, decrease audio above a given threshold. Unlike analog compressors, they increase gain below the threshold. The
result from either analog or digital compression is exactly the same — less
dynamic range
As shown in the following diagram, the audio path takes two routes. One path
goes through a predelay mechanism which delays the audio a maximum of 48
ms. The other path sends control information (dependent on the settings of
slope, threshold, attack and release) to “digital VCA’s” labeled MAX COMP
GAIN and EXP GAIN. As the signal crosses the threshold point, both Compressor Gain and Expansion Gain vary constantly. Compressor Gain determines the
maximum amount of gain increase below the threshold; Expansion Gain
determines the maximum amount of gain attenuation below
there are separate thresholds for compression and expansion.
Generally, digital compression requires lower threshold settings than analog
compression. The reason for this is that there is no such thing as headroom in
a digital system — dBfs (Digital Full scale [0VU]) is the maximum level audio.
Audio dynamics below full scale, however, can be manipulated and modified.
The whole purpose of a digital compressor is to maintain peaks while compressing lower level audio signals upwards. If you think about it in terms of the most
significant and least significant bits, you would never want to reduce the most
significant bits — you want to increase the least sigificant bits.
.
the threshold. Note,
General Description
Adding some pre-delay gives the control mechanism time to react before the
audio reaches the digital VCA. Of course, the more predelay you add, the more
“out of sync” the audio will become. Attack constants should be kept to short
values (7,15, or 30ms). A good starting point for release time is 91 or 114 ms.
4-35
Loading...
+ hidden pages
You need points to download manuals.
1 point = 1 manual.
You can buy points or you can get point for every manual you upload.