Alesis QUADRAVERB2 User Manual
ALESIS
QuadraVerb2
Reference Manual
Introduction
Thank you for purchasing the Alesis QuadraVerb 2 simultaneous effects processor.
To take full advantage of of the QuadraVerb 2’s fuctions, and to enjoy long and
trouble free use, please read this user’s manual carefully.
How To Use This Manual
This manual is divided into the following sections describing the various modes of the
QuadraVerb 2. Though we recommend you take time to read through the entire
manual once carefully, those having general knowledge about effects devices should
use the table of contents and index to reference specific functions while using this
device. If you are planning to use the Alesis optical digital I/O, read chapter 7 carefully.
Chapter 1: Setting Up. Deals with the necessary preparation before using,
including connections to other components, such as instruments, mixing consoles,
patchbays, multitrack recorders, as well as digital connections to ADAT.
Chapter 2: Your First Session with the QuadraVerb 2. A basic introduction
to getting the unit up and running, auditioning the factory Programs, adjusting levels,
comparing and storing edited Programs.
Chapter 3: Overview. A detailed look at the signal processing capabilities of the
QuadraVerb 2, and the concepts of multi-effect programming.
Chapter 4: Making Your Own Patches. A guided tour for programming typical
single and multi-effect applications.
J
Chapter 5: Description of Controls. A “dictionary” of all parameters, buttons
and connectors, including Global mode parameters.
Chapter 6: Advanced Applications. Advanced uses of the QuadraVerb 2,
such as MIDI functions, footswitches and using “tap tempo” to control delay times.
Chapter 7: Alesis Optical Interface. How the QuadraVerb 2 fits into an ADATcompatible studio.
Chapter 8: Trouble-Shooting. Contains the Trouble-shooting Index,
maintenance and service information, and MIDI implementation chart.
Conventions
The buttons, knobs, and rear panel connectors are referred to in this manual just as
their names appear on the QuadraVerb 2, using all capital letters and in brackets
(
Examples:
[DIGITAL IN] connector, etc.).
When something important appears in the manual, an icon (like the one on the left)
will appear in the left margin. This symbol indicates that this information is vital when
operating the QuadraVerb 2.
[PROGRAM] button, [< BLOCK] button, [VALUE/ENTER] knob/button,
QuadraVerb 2 Reference Manual 1
2 QuadraVerb 2 Reference Manual
Contents
CONTENTS
1: Setting Up .................................................................................................................. 7
Unpacking and Inspection....................................................................................... 7
AC Power Hookup.................................................................................................. 7
Line Conditioners and Protectors................................................................ 7
Audio Connections................................................................................................. 8
Typical Applications.................................................................................... 8
Interfacing Directly with Instruments............................................................. 9
Interfacing to a Mixing Console.................................................................... 10
Avoiding Ground Loops ... ........................................................................... 15
MIDI ....................................................................................................................... 16
Alesis Optical.......................................................................................................... 16
Footswitches.......................................................................................................... 16
Advance.................................................................................................... 17
Bypass....................................................................................................... 17
Tap Tempo................................................................................................. 17
2: Your First Session With The QuadraVerb 2........................................................ 19
Powering Up.......................................................................................................... 19
Setting Levels ........................................................................................................ 19
The Value/Enter Knob ............................................................................................ 20
Adjusting the Display Contrast..................................................................... 20
Auditioning Internal Programs.................................................................................. 21
Switching Between Preset and User Banks.................................................. 21
Example Programs.................................................................................................. 22
96: “VerbOfMyDreams”............................................................................... 22
97: “Guitar Rack ”....................................................................................... 22
98: “Stereo Plates” ..................................................................................... 22
Adjusting Effects Levels......................................................................................... 23
Comparing an Edited Program to its Original Settings................................................ 24
Restoring an Edited Program to its Original Settings.................................................. 24
Storing Edited Programs......................................................................................... 25
Bypassing Effects................................................................................................... 26
Global Direct Signal Muting...................................................................................... 26
3: Overview.................................................................................................................... 27
The Architecture of the QuadraVerb 2...................................................................... 27
What is a Block?.......................................................................................... 27
Selecting and Editing Blocks....................................................................... 27
Routing “Patch Cords” Between Blocks ....................................................... 28
Setting the Routing Levels.......................................................................... 29
The LR IN................................................................................................... 29
Reaching the Outputs - LR OUT.................................................................. 29
Limit Handling......................................................................................................... 30
Equalization........................................................................................................... 32
Filters......................................................................................................... 32
Shelving EQs ............................................................................................. 33
Single Band EQs ........................................................................................ 33
Multiband EQs............................................................................................ 34
5 Band Graphic EQ ..................................................................................... 34
Resonator.................................................................................................. 35
Mono/Stereo Tremolo................................................................................. 35
Stereo Simulator......................................................................................... 35
Pitch Effects........................................................................................................... 36
Mono Chorus............................................................................................. 36
QuadraVerb 2 Reference Manual 3
Contents
Stereo Chorus............................................................................................ 36
Quad Chorus.............................................................................................. 37
Mono Flanging........................................................................................... 37
Stereo Flanging.......................................................................................... 37
Phasor....................................................................................................... 38
Mono/Stereo Lezlie Cabinet........................................................................ 38
Pitch Shifter............................................................................................... 38
Pitch Detune .............................................................................................. 38
Ring Modulator........................................................................................... 38
Delay ..................................................................................................................... 39
Mono Delay and Stereo Delay...................................................................... 39
Ping Pong Delay......................................................................................... 39
Multi Tap Delay ........................................................................................... 39
Tap Tempo Mono Delay and Ping Pong....................................................... 39
Reverberation........................................................................................................ 40
Mono Room............................................................................................... 40
Room 1...................................................................................................... 40
Hall 1.......................................................................................................... 40
Plate 1....................................................................................................... 40
Chamber 1................................................................................................. 40
Room 2...................................................................................................... 40
Hall 2.......................................................................................................... 40
Plate 2....................................................................................................... 41
Chamber 2................................................................................................. 41
Large Plate................................................................................................. 41
Large Room............................................................................................... 41
Spring........................................................................................................ 41
Nonlinear................................................................................................... 41
Reverse ..................................................................................................... 41
Reverb Parameters................................................................................................. 42
Decay........................................................................................................ 42
Damping – Hi & Lo ...................................................................................... 42
Reverb Density........................................................................................... 42
Diffusion.................................................................................................... 42
Input High Frequency Roll Off...................................................................... 43
Predelay.................................................................................................... 43
Predelay Mix............................................................................................... 43
Reflection Level and Spread....................................................................... 43
Reverberation Swirl..................................................................................... 43
Reverberation Attack.................................................................................. 43
Gating........................................................................................................ 44
4: Making Your Own Programs.................................................................................. 45
Getting Started ....................................................................................................... 45
Programming A Single Block................................................................................... 46
Type .......................................................................................................... 46
Routing...................................................................................................... 47
Parameter .................................................................................................. 49
Mix............................................................................................................. 50
Programming Multiple Blocks................................................................................... 51
Defining New Blocks................................................................................... 51
Deleting Unnecessary Routings.................................................................. 51
Patching In The New Blocks........................................................................ 52
Adjusting Parameters.................................................................................. 53
Moving and Swapping Blocks.................................................................................. 53
Changing Effect Types........................................................................................... 54
5: Description of Controls ............................................................................................ 57
Front Panel............................................................................................................ 57
4 QuadraVerb 2 Reference Manual
Contents
Input Level ................................................................................................. 57
Output Level .............................................................................................. 57
LED Meter.................................................................................................. 57
Display....................................................................................................... 57
Value/Enter................................................................................................ 58
Program..................................................................................................... 59
Store......................................................................................................... 60
Compare.................................................................................................... 60
Bypass....................................................................................................... 60
< Block >.................................................................................................... 60
< Page >.................................................................................................... 61
Type .......................................................................................................... 61
Parameter .................................................................................................. 61
Routing...................................................................................................... 61
Mix............................................................................................................. 62
Global ........................................................................................................ 62
Name......................................................................................................... 64
MIDI ........................................................................................................... 64
Modulation ................................................................................................. 66
Power ........................................................................................................ 67
Rear Panel............................................................................................................. 67
Power ........................................................................................................ 67
MIDI In........................................................................................................ 67
MIDI Thru/Out............................................................................................. 67
Bypass......................... - Bypass Footswitch............................................... 67
Advance...................... - Program Advance Footswitch ............................... 67
48kHz in....................... - Sample Clock Input .............................................. 67
Digital In ....................... - Digital Audio In ..................................................... 68
Digital Out.................... - Digital Audio Out.................................................. 68
Left/Right In................. - Analog Audio In ................................................... 68
Left/Right Out.............. - Analog Audio Out ................................................ 68
Effect Parameters................................................................................................... 69
Equalization............................................................................................... 69
Pitch .......................................................................................................... 70
Delay ......................................................................................................... 71
Reverberation............................................................................................ 72
6: Advanced Applications............................................................................................ 75
MIDI Functions........................................................................................................ 75
Global MIDI Channel.................................................................................... 75
Receiving Program Changes....................................................................... 75
Program Change Table............................................................................... 76
SysEx Storage........................................................................................... 77
MIDI Thru.................................................................................................... 78
Realtime Modulation Functions................................................................................ 78
Selecting the Modulator .. ... ......................................................................... 79
Choosing a Target...................................................................................... 79
Choosing a Source ..................................................................................... 81
Setting the Amplitude ................................................................................. 82
Local Generators........................................................................................ 82
Footswitch Controls ................................................................................................ 85
Program Advance....................................................................................... 85
Bypassing Effects....................................................................................... 86
Controlling Delay Time via Tap Tempo.......................................................... 86
7: Alesis Optical Interface............................................................................................ 87
Overview................................................................................................................ 87
Digital Clock Synchronization................................................................................... 87
Connections.......................................................................................................... 88
QuadraVerb 2 Reference Manual 5
Contents
To a Single ADAT....................................................................................... 88
To Two or More ADATs ............................................................................... 89
To the AI-1................................................................................................. 91
From the QuadraSynth................................................................................ 91
Routings ................................................................................................................ 92
To specific ADAT tracks............................................................................... 92
From ADAT through the QuadraVerb 2 back to ADAT ................................... 93
From the QuadraSynth through the QuadraVerb 2 back to ADAT................... 94
8: Trouble-Shooting ..................................................................................................... 95
Trouble-Shooting Index .......................................................................................... 95
Error Messages...................................................................................................... 96
Checking the Software Version............................................................................... 97
Re-initializing.......................................................................................................... 97
Total Reset............................................................................................................. 97
Maintenance/Service.............................................................................................. 97
Cleaning.................................................................................................... 97
Warranty Information................................................................................... 97
Refer All Servicing To Alesis........................................................................ 97
Obtaining Repair Service............................................................................. 98
MIDI Implementation Chart......................................................................................... 99
Specifications ................................................................................................................ 100
Effects Processing Index............................................................................................. 102
6 QuadraVerb 2 Reference Manual
CHAPTER 1
SETTING UP
Unpacking and Inspection
Your QuadraVerb 2 was packed carefully at the factory, and the shipping carton was
designed to protect the unit during shipping. Please retain this container in the highly
unlikely event that you need to return the QuadraVerb 2 for servicing.
The shipping carton should contain the following items:
• This instruction manual
• Alesis QuadraVerb 2 with the same serial number as shown on shipping carton
• AC Power Supply Adapter
• Alesis warranty card
It is important to register your purchase; if you have not already filled out your warranty
J
AC Power Hookup
card and mailed it back to Alesis, please take the time to do so now.
The QuadraVerb 2 comes with a power adapter suitable for the voltage of the country
it is shipped to (either 110 or 220V, 50 or 60 Hz).
Setting Up - Chapter 1
With the QuadraVerb 2 off, plug the small end of the power adapter cord into
QuadraVerb 2’s [POWER] socket and the male (plug) end into a source of AC power.
It’s good practice to not turn the QuadraVerb 2 on until all other cables are hooked up.
Alesis cannot be responsible for problems caused by using the QuadraVerb 2 or any
J
associated equipment with improper AC wiring.
Line Conditioners and Protectors
Although the QuadraVerb 2 is designed to tolerate typical voltage variations, in
today’s world the voltage coming from the AC line may contain spikes or transients
that can possibly stress your gear and, over time, cause a failure. There are three main
ways to protect against this, listed in ascending order of cost and complexity:
• Line spike/surge protectors. Relatively inexpensive, these are designed to
protect against strong surges and spikes, acting somewhat like fuses in that they
need to be replaced if they’ve been hit by an extremely strong spike.
• Line filters. These generally combine spike/surge protection with filters that
remove some line noise (dimmer hash, transients from other appliances, etc.).
• Uninterruptible power supply (UPS). This is the most sophisticated option. A UPS
provides power even if the AC power line fails completely. Intended for computer
applications, a UPS allows you to complete an orderly shutdown of a computer
system in the event of a power outage, and the isolation it provides from the
power line minimizes all forms of interference—spikes, noise, etc.
Audio Connections
The connections between the QuadraVerb 2 and your studio are your music’s lifeline,
so use only high quality cables. These should be low-capacitance shielded cables
with a stranded (not solid) internal conductor and a low-resistance shield. Although
QuadraVerb 2 Reference Manual 7
Chapter 1 - Setting Up
quality cables cost more, they do make a difference. Route cables to the QuadraVerb
2 correctly by observing the following precautions:
• Do not bundle audio cables with AC power cords.
• Avoid running audio cables near sources of electromagnetic interference such as
transformers, monitors, computers, etc.
• Do not place cables where they can be stepped on. Stepping on a cable may not
cause immediate damage, but it can compress the insulation between the center
conductor and shield (degrading performance) or reduce the cable’s reliability.
• Avoid twisting the cable or having it make sharp, right angle turns.
• Never unplug a cable by pulling on the wire itself. Always unplug by firmly
grasping the body of the plug and pulling directly outward.
• Although Alesis does not endorse any specific product, chemicals such as
Tweek and Cramolin, when applied to electrical connectors, are claimed to
improve the electrical contact between connectors.
Typical Applications
J
The analog audio inputs and outputs are typically used in one of three ways:
• from one or two effect/aux send outputs of a mixer, and out to the effect return
inputs of the mixer; or,
• from a line-level instrument (like a guitar or keyboard with either a mono or stereo
output), and out to an amplifier or mixer input; or,
• from the stereo buss outputs of a mixer to a mix-down tape machine or amplifier.
When used with a mono source, the QuadraVerb is placed between the source and
the mixer/amplifier. Although the source may be mono, both the [LEFT] and [RIGHT]
outputs can be connected to the inputs of a mixer/amplifier if stereo processing
effects are desired. Alternatively, you could use the INSERTS on your mixer to “patch
in” only the left or right channel of the QuadraVerb 2. If using the effect sends of a
mixer, you have the advantage of sending any of the mixer’s input channels to the
QuadraVerb 2’s input(s), and have control over the level of each channel being sent.
There are other combinations of input and outputs possible when you begin using
the Alesis optical digital input and output. See the “Alesis Optical” section later in this
chapter. For more information on interfacing with other digital audio equipment, see
chapter 7.
Interfacing Directly with Instruments
When connecting audio cables and/or turning power on and off, make sure that all
devices in your system are turned off and the volume controls are turned down.
The QuadraVerb 2 has two 1/4” balanced inputs and two 1/4” balanced outputs.
These provide three different (analog) audio hookup options:
• Mono. Connect a cable to the [R] INPUT of the QuadraVerb 2 from a mono
source, and another cable from the [R] OUTPUT of the QuadraVerb 2 to an
amplification system or mixer input.
8 QuadraVerb 2 Reference Manual
Setting Up - Chapter 1
Instrument or Effect Send
Right
Input
TM
To Amplifier or Mixing Console
Right
Output
• Mono In, Stereo Out. While still using a mono input, you could connect two
cables to the [L] and [R] OUTPUTS of the QuadraVerb 2 to a stereo amplification
system or two mixer inputs.
Instrument or Effect Send
Right
Input
TM
To Amplifier or Mixing Console
Right
Output
Left
Output
• Dual Mono or Stereo Source. The QuadraVerb 2 may be used with two
different instruments simultaneously, or with a stereo instrument. The hookup is
the same; the difference is in the routing used within a program. A program may
process the two inputs discretely, using blocks dedicated to a single channel (for
example, a delay for a guitar and a gated reverb for a bass), or process them in
stereo (for example, with the left and right outputs of a keyboard routed through
two reverb blocks). Connect two cables to the [L] and [R] INPUTS of the
QuadraVerb 2 from two mono sources or from the stereo output of the instrument,
then connect two other cables from the [L] and [R] OUTPUTS of the QuadraVerb 2
to a stereo amplification system or two mixer inputs.
Instrument or Effect Send
Left Input
TM
Note:
In most cases when plugging an instrument directly into the QuadraVerb 2 ,
Right
Input
To Amplifier or Mixing Console
Right
Output
2
7
BLOCK
Left
Output
you’ll use Programs which route the "dry" signal at the input(s) directly to the
output(s), where it will be mixed together with the effected signal to achieve the
proper wet/dry mix at the QuadraVerb 2's outputs. If the program doesn't include this
routing, you will only hear the effected signal by itself. Therefore, it may be necessary
to edit such programs to add these "dry" routes when using the QuadraVerb 2
directly with an instrument. (The Factory Preset programs usually include these
routes.)
Interfacing to a Mixing Console
The QuadraVerb 2 handles mono or stereo sends at all system levels. The input
circuitry of the QuadraVerb 2 can easily handle +4 dBu levels (+19 dBu peaks), while
having enough input and output gain to interface with the lower -10 dBV signal levels
of many recording systems.
QuadraVerb 2 Reference Manual 9
Chapter 1 - Setting Up
The QuadraVerb 2 may be connected to a mixing console in several ways. Usually, it
is connected to the auxiliary send and return controls of the mixer. Another method of
interfacing is to connect the unit directly to the insert send and return patch points of
the channel that is to be effected. Still another way of interfacing the QuadraVerb 2 to
a mixer or recording console would be in-line across the output of your mixing
console. This last setup would be used only if you needed to effect the entire mix.
Using the Aux Sends
Generally, mixing consoles provide two types of auxiliary sends: pre-fader sends for
creating a cue (headphone) mix, and individual, post-fader effect sends. Typically, if a
mixer has more than two sends per channel (4, 6 or 8, perhaps), the first two sends
are reserved for the cue sends, while the remaining sends are used to feed effects. If
you are using a mixer with more than two sends, connect the QuadraVerb 2 using
post-fader sends.
Using a mixer’s aux sends poses a distinct advantage: each channel has its own level
control feeding the aux output (and eventually the QuadraVerb 2 input). This allows
you to make a mix of any channels you want to go to the effects by using the
individual channels’ aux send levels on the mixer. Most consoles also have aux
master controls, which set the overall level of each aux output.
Coming back from the QuadraVerb 2’s outputs into the mixer, you have two options:
• connecting to dedicated return inputs, or
• connecting to channel inputs.
The former is good if your mixer provides dedicated inputs (called returns) for effect
devices like the QuadraVerb 2. If your mixer does not have these, or you have already
used them all, consider connecting the QuadraVerb 2 to channel inputs or unused
tape returns.
Setting the Effect/Dry Balance
No matter where you connect the output of the QuadraVerb 2 into the mixer, you are
in control of the balance between the mixer’s channel inputs (the uneffected signal
being routed to the aux sends and the Mix) and the effect returns coming from the
QuadraVerb 2. The effect returns generally should only contain effected signal, and
not have any uneffected signal mixed with it (since these two signals are blended
together at the mixer).
If the Program you are using has the LR IN connected to the LR OUT, you may be
getting some dry, uneffected signal at the return. Generally, this is not desirable,
since the "dry" signal is already being heard through the original channel’s fader.
Therefore, in a mixer application you will want to cut the QuadraVerb 2’s Program’s
path which connects the inputs to the outputs. This can be done in three ways:
• Go to the Mix parameters to bring down the direct level
• Go to the Routing function of each program and remove the patch cords
connecting the inputs to the outputs
• Turn on the Global Direct Signal Mute function. This is the easiest method.
10 QuadraVerb 2 Reference Manual
J
Setting Up - Chapter 1
Most Preset Programs route the LR IN signal to the LR OUT.When connecting to a
mixer’s aux sends and returns. the Global Direct Signal Mute should be set to ON.
To remove all direct routings of inputs to outputs on all Programs simultaneously:
¿ Press [GLOBAL].
The [GLOBAL] LED will be lit.
¡ Press [< PAGE] once.
This selects Global Page 9. The display will read:
GLOBAL DIRECT SIGNAL MUTE:
OFF
¬ Turn the [VALUE/ENTER] knob to the right until the display reads “ON.”
The next Program recalled which has the inputs routed to the outputs will not
display the patch cords for these connections nor will you hear any direct
uneffected signal at the outputs.
QuadraVerb 2 Reference Manual 11
Chapter 1 - Setting Up
Mono In - Stereo Out. If you only want to feed the QuadraVerb 2 a mono input,
but wish to connect both of its outputs back to the mixer, you will need three 1/4"
audio cables. Connect a cable from an effect send to the [R] INPUT of the
QuadraVerb 2, another cable from the [L] OUTPUT of the QuadraVerb 2 to an effect
return or other mixer input, and another cable from the [R] OUTPUT of the
QuadraVerb 2 to an adjacent mixer input.
Aux Send 1
Mixer
Stereo In - Stereo Out. This connection is similar to the one described above.
However, by utilizing two sends from the mixer, we add one more cord and can now
send a stereo signal to the QuadraVerb 2’s inputs. Example, if you connected effect
sends 3 and 4 to the [L] and [R] INPUTS, and had a stereo instrument (such as a
keyboard) connected to two channel inputs of the mixer (either one panned hard left
and hard right), you would send the left channel to send 3 and the right channel to
send 4. Alternatively, you could have two discrete effect sends between the Left and
Right channel, and process each separately within the QuadraVerb 2. For example,
the Left channel (from send 3) could be a chorus, and the Right (from send 4) could be
a reverb. This is similar to Dual Mono, described earlier.
Right Input
Right OutputLeft Output
Aux Return or Input Channel
Aux Return or Input Channel
Right Input
Left Input
Right OutputLeft Output
Aux Send 3
Aux Send 4
Aux Return or Input Channel
Aux Return or Input Channel
Mixer
Using Inserts
By using individual channel inserts, you can dedicate the QuadraVerb 2 to a specific
channel (or pair of channels) on the mixer. The Insert connections on the back of the
mixer provide a way of “inserting” external processing equipment into the signal path.
The insert occurs after the input amplifier, and before the main fader; essentially it is
the same as connecting the source (instrument or microphone) into the QuadraVerb
2 before the mixer’s channel input. However, some mixing console’s inserts come
after the EQ section, and may therefore be different from the original signal.
12 QuadraVerb 2 Reference Manual
Setting Up - Chapter 1
Usually, insert connections require a special, stereo-splitting Y-cord to be connected
(one stereo plug provides both send and return while two mono plugs connect
separately to an input and output). These are known as TRS connectors (tip-ringsleeve). The tip of the stereo plug typically carries the send or output of the insert
jack, while the ring carries back the return. The sleeve represents a common ground
for both signals. Check the manual of your mixer because some are wired differently
(for example, having two separate jacks for send and receive).
Mono. This involves connecting a 1/4" TRS (tip-ring-sleeve) to the Insert jack of a
single channel on a mixing console. The other end of the cable (which splits into two,
1/4" mono connectors) are connected to the [R] INPUT and [R] OUTPUT,
respectively. If you do not hear any audio after making these connections, swap the
input and output cables at the QuadraVerb 2, as these may be wired backwards. If the
cable is color-coded, usually the red jack represents the send (which connects to the
QuadraVerb 2’s INPUT) and black is the return (which connects to the OUTPUT).
MIXER
Insert
Right Input Right Output
3
QuadraVerb 2 Reference Manual 13
Chapter 1 - Setting Up
Stereo. In the case where a stereo instrument, such as a keyboard or sampler, is
connected to two separate channels of a mixing console, you will need two 1/4" TRS
cables, one for each channel. The connection is made in a similar fashion as
described above.
MIXER
Left
Master
Insert
Left Input Left Output
Right Input Right Output
Right
Master
Insert
Using Main Outputs
When you want to effect everything on the mixer, you can connect the QuadraVerb 2
between the mixer’s outputs and the amplifier’s or tape machine’s inputs. This is done
by using two 1/4" cables to connect the Left and Right Main Outputs of the mixing
console to the [L] and [R] INPUTs of the QuadraVerb 2. The [L] and [R] OUTPUTs of
the QuadraVerb 2 are then connected to a stereo amplifier, or two input channels of
another mixing console (for sub-mixing applications).
Right Input
Left Input
Left
Master
Out
Right
Master
Out
Right OutputLeft Output
Left Input Right Input
Mixer
Stereo Amp
If your mixer’s outputs use XLR balanced connectors, use the illustration below as a
guide for wiring cables to connect to the QuadraVerb 2’s inputs.
14 QuadraVerb 2 Reference Manual
Setting Up - Chapter 1
12
3
Tip
Sleeve
Ring
Avoiding Ground Loops
In today’s studio, where it seems every piece of equipment has its own computer chip
inside, there are many opportunities for ground loop problems to occur. These show
up as hums, buzzes or sometimes radio reception, and can occur if a piece of
equipment “sees” two or more different paths to ground. While there are methods to
virtually eliminate ground loops and stray radio frequency interference, most of the
professional methods are expensive and involve installing a separate power source
just for the sound system. Here are some easy helpful hints that a professional studio
installer might use to keep those stray hums and buzzes to a minimum.
¿ KEEP ALL ELECTRONICS OF THE SOUND SYSTEM ON THE SAME AC
ELECTRICAL CIRCUIT. Most stray hums and buzzes happen as a result of
different parts of the sound system being plugged into outlets of different AC
circuits. If any noise generating devices such as air conditioners, refrigerators,
neon lights, etc., are already plugged into one of these circuits, you then have a
perfect condition for stray buzzes. Since most electronic devices of a sound
system don’t require a lot of current (except power amplifiers), it’s usually safe to
run a multi-outlet box (or two) from a
components of your system there.
SINGLE
wall outlet, and plug in all of the
MIDI
¡ KEEP AUDIO WIRING AS FAR AWAY FROM AC WIRING AS POSSIBLE. Many
hums come from audio cabling being too near AC wiring. If a hum occurs, try
moving the audio wiring around to see if the hum ceases or diminishes. If it’s not
possible to separate the audio and AC wiring in some instances, make sure that
the audio wires don’t run parallel to any AC wire (they should only cross at right
angles, if possible).
¬ TO ELIMINATE HUM IF THE ABOVE HAS FAILED:
A) Disconnect the power from all outboard devices and tape machines except
for the mixer and control room monitor power amp.
B) Plug in each tape machine and outboard effects device one at a time. If
possible, flip the polarity of the plug of each device (turn it around in the
socket) until the quietest position is found.
C) Make sure that all of the audio cables are in good working order. Cables with a
detached ground wire will cause a very loud hum!!
D) Keep all cables as short as possible, especially in unbalanced circuits.
If the basic experiments don’t uncover the source of the problem, consult your dealer
or technician trained in proper studio grounding techniques. In some cases, a “star
grounding” scheme must be used, with the mixer at the center of the star providing
the shield ground on telescoping shields, which do NOT connect to the chassis
ground of other equipment in the system.
MIDI is an internationally-accepted protocol that allows music-related data to be
conveyed from one device to another. The MIDI connections on the QuadraVerb 2
provide four different functions:
QuadraVerb 2 Reference Manual 15
Chapter 1 - Setting Up
• To recall programs using MIDI program change messages
• To control various parameters inside the QuadraVerb 2 in realtime via MIDI
controllers (
• To send and receive SysEx (System Exclusive) dumps of individual programs or
the entire bank of programs for storage and retrieval purposes
• To pass-on MIDI information thru the QuadraVerb 2 to another MIDI device.
To connect the QuadraVerb 2’s MIDI ports to another MIDI device:
¿ Connect a MIDI cable from the QuadraVerb 2’s MIDI [THRU/OUT] connector to the
MIDI IN connector of the other MIDI device.
¡ Connect another MIDI cable from the QuadraVerb 2’s MIDI [IN] connector to the
other MIDI device’s MIDI OUT connector.
For more information about MIDI, refer to chapter 6.
Alesis Optical
The Alesis Optical interface provides two EIAJ fiber optic connectors for [DIG IN] and
[DIG OUT]. These connectors use a proprietary Alesis multichannel format first
introduced with the ADAT Multitrack Recorder. The QuadraVerb 2 can send and/or
receive digital audio directly to/from an ADAT (or other devices which use the same
optical interface). Digital connections provide better fidelity than the analog inputs
and outputs.
example:
A keyboard’s mod wheel, or pedals, etc.)
The proprietary Alesis Optical format carries up to 8 audio channels on a single fiber
optic cable. Since the QuadraVerb 2 has two channels (left and right), you may
choose two of the incoming 8 channels for the QuadraVerb 2 to process. The
QuadraVerb 2’s Left and Right Outputs can then be routed in the digital format using
any two channels (they don’t have to be the same as the input channels). Fiber optic
cables of various lengths are available from your Alesis dealer. The shorter the cable,
the better. The OC cable is 5 meters long (16'4") and is the maximum length
recommended.
Footswitches
On the rear panel you will find two footswitch jacks labeled [ADVANCE] and
[BYPASS]. Any momentary single-pole/single-throw footswitch, normally open or
normally closed, will work for the two footswitch functions. These should be plugged
in prior to power-up so that the QuadraVerb 2 can configure itself for the type of
footswitch being used.
Advance
The [ADVANCE] jack lets you scroll through the Programs in memory by advancing to
the next higher numbered Program each time the connected footswitch is pressed.
The QuadraVerb 2 will “wrap-around” whenever it reaches the end of available
Programs and the Advance footswitch is pressed again. You can set a range of
Programs to be used, thereby cutting off other Programs from being recalled in this
manner. For example, if you set the range to be User 10 through User 24, only
Programs within this range will be recalled using the Advance footswitch. If Program
24 is selected and the footswitch is pressed again, Program 10 is recalled.
16 QuadraVerb 2 Reference Manual
Setting Up - Chapter 1
To adjust the Advance Footswitch’s set of Programs:
¿ Press [GLOBAL].
The [GLOBAL] LED will light.
¡ Press [PAGE >] once.
This selects page 2, and the display will read:
FOOTSWITCH: 00 Pset TO 00 Pset
¬ Turn the [VALUE/ENTER] knob to adjust the Program number to begin the range
(Preset 00 — 99, User 00 — 99).
÷ Press [PAGE >] once and use the [VALUE/ENTER] knob to adjust the Program
number to end the range (Preset 00 — 99, User 00 — 99).
Bypass
The Bypass footswitch jack lets you turn the Bypass function on and off from a
connected footswitch. When pressed, the [BYPASS] LED will light, indicating that
Bypass mode is enabled. When pressed again, the [BYPASS] LED will turn off.
For more information about Bypass mode, see chapters 2 and 5.
Tap Tempo
Either footswitch jack can be used to provide a tap tempo source for setting delay
time, provided the selected Program uses one of the two available tap tempo delay
types. This requires that you have defined an Effect Block as one of the two Tap
Tempo delay types, and that the desired footswitch jack has been selected for
controlling tap tempo. To select a footswitch jack for use with a Tap Tempo Delay:
¿ Press [GLOBAL].
The [GLOBAL] LED will light.
¡ Press [< PAGE] twice to select Global Page 8.
The display will read:
TAP TEMPO FOOTSWITCH: NONE
¬ Turn the [VALUE/ENTER] knob to select either the ADVANCE or BYPASS
footswitch jack, depending on which one you wish to use to control tap tempo.
QuadraVerb 2 Reference Manual 17
18 QuadraVerb 2 Reference Manual
Your First Session With The QuadraVerb 2 - Chapter 2
CHAPTER 2
YOUR FIRST SESSION WITH THE
QUADRAVERB 2
Powering Up
After making your connections, turn on the system’s power using this procedure:
¿ Before turning on the QuadraVerb 2’s power, check the following items:
• Have all connections been made correctly?
• Are the volume controls of the amplifier or mixer turned down?
¡ Turn on the [POWER] switch on the front panel of the QuadraVerb 2.
Upon power-up, the QuadraVerb 2 will display the last selected Program, and the
[PROGRAM] button’s LED will be lit. If this Program has been edited, the display
will indicate this by showing the word “EDITED”, and by flashing the Program
Number and Name in the upper display.
¬ Turn on the power of the amplifier/mixer, and adjust the volume.
Setting Levels
Proper setting of the [INPUT LEVEL] and [OUTPUT] knobs is crucial in order to
achieve the maximum signal-to-noise ratio (the concentric knobs allow the Left and
Right Input levels to be adjusted separately). As a good starting point, set both input
and output level controls at about 2 o'clock or 65% of full. This will decrease the
possibility of overload distortion and keep the amount of background noise to a
minimum.
For quietest operation, you should adjust the level of the source being sent to the
J
QuadraVerb 2 so that the green [-3dB] LEDs in the QuadraVerb 2’s peak meter flash,
but not so loud that the red [CLIP] LEDs turn on. A nominal input sound make the
-12dB LED turn on
QuadraVerb 2 Reference Manual 19
Chapter 2 -Your First Session With The QuadraVerb 2
The Value/Enter Knob
Located just to the right of the custom LCD display, the [VALUE/ENTER] knob is
used to select Programs and adjust parameter values that appear in the display.
However, it is not just a knob, it is also a button. Depending on what parameter you
are editing, the [VALUE/ENTER] knob will work in either one of two ways:
Immediate. The desired value is selected by turning the [VALUE/ENTER] knob,
and immediately takes effect. This is the case when adjusting most parameters.
Deferred. The desired value is selected by turning the [VALUE/ENTER] knob, but
the new value will only take effect after the [VALUE/ENTER] button has been
pressed. The newly selected value will flash in the display until it is selected in this
manner. If you change the parameter back to its original setting, the value in the
display will not flash. Also, if you go to another Page, or select another Function (by
pressing any button), the parameter will be left unchanged. If you went back to look at
the previous parameter, it will be set back to its original setting. This mode is used for
parameters that cause architectural changes such as changing a Block’s function,
effect type, and routing signals.
The [VALUE/ENTER] button can also be used to step through Pages in the currently
selected mode. Except when a value is flashing on and off in the display, the
[VALUE/ENTER] button ordinarily doubles for the [PAGE >] button. If you change
the value of a parameter that uses “deferred mode,”, you must press the
[VALUE/ENTER] button to enter the new value (the display will stop flashing), and
then you can press it again to move to the next Page (or to the next parameter, if more
than one parameter appears in the display). This is a feature for power users who want
to be able to move around the various pages quickly and make changes as fast as
possible.
J
Unique Exception: When editing the Delay Time parameter of a Delay Block set to
either Tap Tempo Mono Delay or Tap Tempo Ping Pong, the
button is used to “tap” in a tempo . See chapter 6 for more information.
[VALUE/ENTER]
Adjusting the Display Contrast
Occasionally, the characters in the LCD display may be difficult to read, depending on
the viewing angle and existing lighting conditions. In such a situation, adjust the
contrast of the LCD display using the following procedure.
¿ Press [GLOBAL].
The display will go to the Global Mode Page 1.
ADJUST DISPLAY CONTRAST: 5
¡ Adjust the contrast by turning the [VALUE/ENTER] knob.
The display’s contrast and its value in the display will change.
20 QuadraVerb 2 Reference Manual
Your First Session With The QuadraVerb 2 - Chapter 2
Auditioning Internal Programs
You can audition the Programs in the QuadraVerb 2 by using the [VALUE/ENTER]
knob or the front panel buttons, whenever the QuadraVerb 2 is in Program mode (the
[PROGRAM] button’s LED will be lit).
To select a Program using the [VALUE/ENTER] knob:
¿ Press [PROGRAM].
The
[PROGRAM]
¡ Turn the [VALUE/ENTER] knob.
Note:
The [VALUE/ENTER] knob has two modes when used for selecting Programs:
Direct and Deferred. Direct mode immediately recalls the displayed Program as you
turn the [VALUE/ENTER] knob. Deferred mode lets you scroll through the Programs
in the display by turning the [VALUE/ENTER] knob, but you must press the
[VALUE/ENTER] button to actually recall a Program. For more information on
choosing between Direct and Deferred mode, see chapter 5.
To select a Program using the front panel buttons:
¿ Hold the [PROGRAM] button.
button’s LED will light.
¡ Use the [1] through [0] buttons to directly select Programs 00 through 99.
These are the right-most ten buttons on the front panel, which double for
[BLOCK >], [TYPE], [ROUTING]
The top line of the display will change to indicate the currently selected Program
number (from 00-99) and its name.
, etc.
PROGRAM: 00 "More Divisions"
The left side of the display always indicates the currently selected Program number (00 – 99).
Directly beneath the two-digit Program number, the word “PRESET” will appear when the Preset
PROGRAM
PRESET
bank is selected.
Switching Between Preset and User Banks
There are two banks in the QuadraVerb 2: Preset and User. They both
contain 100 Programs. However, the Preset bank cannot be permanently changed.
You can edit the Preset Programs, but you can store them only in the User bank. To
switch between the Preset and User bank, follow these steps:
¿ Press and hold the [PROGRAM] button.
¡ Use the [< BLOCK] and [< PAGE] buttons to select either PRESET or USER.
When the Preset bank is selected, the display will show the word “
beneath the PROGRAM Number in the lower left corner. If the User bank is
selected, the word “
PRESET”
will not be visible
.
PRESET
”
QuadraVerb 2 Reference Manual 21
Chapter 2 -Your First Session With The QuadraVerb 2
Example Programs
The following are descriptions of the three example Programs in the Preset bank.
96: “VerbOfMyDreams”
This Program is fairly simple in design, using only 3 Blocks to provide EQ, Delay and
Reverb. It is designed for a mono audio source to be connected to the [R] INPUT. In
the display, you can see the R IN routed to the first Block, which is defined as a 3Band Parametric EQ. The M output of the EQ then is routed to the next Block, which
is a Mono Delay. The M output of the Delay is then routed to the next Block, which is a
Room 2 Reverb. The L output of the Reverb is routed to the L OUT while the R
output of the Reverb is routed to the R OUT. Also, the R IN is routed to both the L and
R OUT, to combine the original dry signal with the wet signal coming from Block #3.
The EQ Block is used to tailor the sound before further processing occurs. You
should make adjustments here based on the signal you feed through it; if the higher
frequencies of the input signal do not sound as good through the Reverb as the mids
and lows, try attenuating them in the EQ. The Delay is used to “thicken” the sound by
adding a few very fast echoes. The Reverb adds ambiance, as if you were in a large
chamber, and completes the total effect.
Using the Mix function, you can adjust the output level of the Reverb Block and the
Direct Signal to create the balance you are looking for.
97: “Guitar Rack”
This Program includes two Pitch Blocks feeding a delay Block, into another Pitch Block,
then into a Reverb Block, and finally yet another Pitch Block. This is a prime example of the
flexibility the QuadraVerb 2 offers to programmers. The Program creates a thick, swirling,
ambient effect that greatly enhances an electric guitar’s sound.
The R IN is routed to Blocks 1 and 2, as well as the L and R OUT. The first two Pitch
Blocks are defined as Pitch Detune type, but are set to different detune amounts to
create a thicker sound. The Delay Block is a Mono Delay which provides a very quick
“slap back” by using a small delay time and no feedback. The third Pitch Block
provides a Stereo Chorus which swirls the detuned, delay signal and feeds directly to
the outputs. The Delay Block’s output is also fed into a Hall 1 Reverb which provides
ambience to the un-chorused signal. The Reverb’s stereo signals are routed to the
QuadraVerb 2’s outputs and mixed with the Stereo Chorus’s signals. Meanwhile, the
Reverb’s mono output feeds a Stereo Flanger whose stereo signals are also
combined with the Stereo Chorus, Reverb and the original input signal at the outputs.
Again, use the Mix parameters to create just the balance you want.
98: “Stereo Plates”
This Program is very simple. It routes the L and R IN through separate stereo type
Reverb Blocks (Plate 1 type, to be precise). Both stereo signals coming out of the two
Reverb Blocks feed the LR OUT. This creates a very clean stereo reverb effect that’s
great for vocals. Play around with the Predelay and Decay parameters to adjust the
attack and length of the reverb.
22 QuadraVerb 2 Reference Manual
Adjusting Effects Levels
Although we may not want to get started editing Programs just yet (that’s left for
chapter 4), it is usually necessary to have immediate control over the output levels of
each Effect Block, as well as the amount of direct level going from the inputs to the
outputs. These are found within Mix mode.
To adjust a Program’s effect levels:
¿ Press the [MIX] button.
The [MIX] button’s LED will light.
¡ Use the [< BLOCK >] buttons to select any of the active Blocks in the display.
If the selected Block is routed to the LR Outputs, the display will read:
LEVEL TO L/R:RVB=100%
The letters RVB in the display example above indicate the selected Block is of the
Reverberation type. Other types are: EQ for Equalization, PCH for Pitch and DLY
for Delay.
¬ Turn the [VALUE/ENTER] knob to adjust the Block’s Level to the LR Outputs,
from 0–100%.
If the selected Block is not routed to the LR Outputs, this setting will be “NONE”
and you will not be able to adjust the value.
Your First Session With The QuadraVerb 2 - Chapter 2
J
÷ Press [PAGE >] to advance to Mix Page 2 and adjust the Direct Level from Input.
The display will read:
DIRECT LEVEL FROM INPUT:
100%
ƒ Turn the [VALUE/ENTER] knob to adjust how much of the dry (uneffected) signal
you wish to hear at the QuadraVerb 2’s outputs, from 0–100%.
If the LR Inputs are not routed to the LR Outputs, this setting will be “NONE” and
you will not be able to adjust the value since there is no direct signal.
If the Global Direct Signal Mute function is turned on, the Direct Level From Input
parameter will have no audible effect, although its setting is remembered when you
store the Program.
ª Press [PAGE >] to advance to Mix Page 3 and adjust the Master Effects Level.
MASTER EFFECTS LEVEL: 100%
D Use the [VALUE/ENTER] knob to adjust the Master Effects Level to the LR
Outputs, from 0–100%.
This parameter comes between the combined Effect Blocks’ outputs and the
QuadraVerb 2’s outputs, and controls the output levels of all active Blocks that
are routed to the LR Outputs simultaneously. However, it does not change the
individual output levels of Effect Blocks that are routed internally (i.e. to other
Blocks).
QuadraVerb 2 Reference Manual 23
Chapter 2 -Your First Session With The QuadraVerb 2
« Use the [< BLOCK >] buttons to select other Blocks, and adjust their levels, as
described above.
Mix parameters affect the Program and are only temporary unless the Program is
J
stored into memory before a another Program is recalled. See later in this chapter for
more about comparing and storing edited Programs.
Comparing an Edited Program to its Original Settings
The left side of the display always indicates the currently selected Program. Once a Program has
been edited, the word “EDITED” appears in the lower left part of the display, just below the
Program Number indicator. If the [PROGRAM] button is pressed (the [PROGRAM] button’s LED
PROGRAM
will light), the display will also indicate the Program has been altered from its stored
version by flashing the Program number and name in the upper section of the display.
By pressing [COMPARE], you can temporarily access the original version
EDITED
While you are in Compare mode, the [COMPARE] button’s LED will be lit. Also, you
cannot adjust any of the Type, Routing, Parameter, Modulation settings. However,
you can move around the various pages and view these original settings and
therefore see the actual differences in settings you have changed.
of the Program you are editing; that is, the last Program saved to the
currently selected location number. This allows you to hear the
differences created by changing parameters in the Program.
Pressing [COMPARE] a second time exits Compare mode; the [COMPARE] button’s
LED will turn off and the edited version of the Program will be accessed. You can go in
and out of Compare mode as often as you like, as long as the display indicates
“EDITED” (i.e., if the Program hasn’t been edited yet, there is nothing to compare it
to).
Restoring an Edited Program to its Original Settings
If you decide to abort the changes you have made to a Program, this can be done in
two easy steps.
To restore an edited Program to its previous, unedited version:
¿ Press [PROGRAM] to select Program mode.
The [PROGRAM] button’s LED will light, and the display will flash the selected
Program number and name.
¡ Press the [VALUE/ENTER] button.
This recalls the last stored version of the currently selected Program number, and
the word “EDITED” disappears from the display. Consequently, any changes you
had made to the Program before recalling are lost. unless you stored the edited
Program into memory.
24 QuadraVerb 2 Reference Manual
Your First Session With The QuadraVerb 2 - Chapter 2
Storing Edited Programs
Once you are satisfied with the changes you have made to a Program, or are creating
a new Program from scratch, you will need to store your edited Program back into
memory. The QuadraVerb 2 will store the currently selected Program in memory
(which is retained when the unit is turned off). If you edit a Program, the changes you
made will still be there the next time you switch on the unit, even if you hadn’t stored
the edited Program into memory yet. However, if you select another Program from
memory before storing the edited Program, your changes will be lost. Although the
QuadraVerb 2 has two banks (Preset and User), you can only store Programs in the
User bank.
The Preset bank cannot be permanently changed. If you edit a Program selected
J
from the Preset bank, you will be able to make changes, but when you attempt to
Store the edited Program, it will be stored into the User bank (in the selected number
location).
To store an edited Program into memory:
¿ Press the [STORE] button.
The [STORE] button’s LED will light. The display will read:
STORE AT: XX "nnnnnnnnnnnnnn"
…whereby XX is a Program number from 0 to 99 and nnnn is the name of the
program that will be overwritten. Both the Program number and name will be
flashing.
¡ Turn the [VALUE/ENTER] knob to select the Program number location in the
User bank to store the edited Program into.
¬ Press the [VALUE/ENTER] button.
The display will momentarily read:
PROGRAM STORED
After storing, the User Program location you chose will automatically be selected
and shown in the display (example: if you edited Program 13 and stored it into
location 25, Program 25 will be selected).
QuadraVerb 2 Reference Manual 25
Chapter 2 -Your First Session With The QuadraVerb 2
Bypassing Effects
At any time you can bypass all effects at once, thereby allowing the direct signal to
pass through the QuadraVerb 2 unchanged. This can be done in two ways:
• by pressing the [BYPASS] button on the front panel; or,
• by connecting a footswitch to the [BYPASS] jack and pressing the footswitch.
Each time either the [BYPASS] button is pressed, or the footswitch connected to the
[BYPASS] jack is pressed, Bypass mode is toggled on and off again. When Bypass
mode is turned on, the [BYPASS] button's LED will be lit.
When Bypass is enabled, all Effect Blocks are momentarily disabled and will not have
J
audio routed from them to the outputs. However, if the Program does not route the
LR Inputs directly to the LR Outputs, you will not hear anything.
In order for the Bypass mode to function correctly, make sure the LR Inputs are
routed to the LR Outputs and that the Global Direct Signal Mute function is turned off
(see below). If the inputs are not routed directly to the outputs, the [BYPASS] button
acts more like a “mute” since nothing will be heard when it is enabled.
Global Direct Signal Muting
The purpose of this feature is to satisfy the conditions of a recording studio
environment. As described in chapter 1, when connecting the QuadraVerb 2 to a
mixing console’s aux sends and returns, it is generally desirable to remove the direct
signal feed from the outputs of the QuadraVerb 2. This is because the signal coming
back from the QuadraVerb 2 should only contain wet (uneffected) signal. The dry
signal is then combined with the returning wet signal at the mixing console.
Since most QuadraVerb 2 Programs route the LR IN signal to the LR OUT, you will
need to mute this connection when connecting to a mixer’s aux sends and returns.
This can be done globally for all Programs.
To remove all direct routings of inputs to outputs on all Programs simultaneously:
¿ Press [GLOBAL].
The [GLOBAL] LED will light.
¡ Press [< PAGE] once.
This selects Global Page 9. The display will read:
GLOBAL DIRECT SIGNAL MUTE:
OFF
¬ Turn the [VALUE/ENTER] knob to the right until the display reads “ON.”
The next Program recalled which has the inputs routed to the outputs will not
display the routes (“patch cords”) for these connections nor will you hear any
direct uneffected signal at the outputs.
26 QuadraVerb 2 Reference Manual
CHAPTER 3
OVERVIEW
The Architecture of the QuadraVerb 2
The QuadraVerb 2 provides eight Effect Blocks per Program, each of which can serve
as either EQ, Pitch, Delay or Reverb. The display shows these Blocks from left to
right, between the LR IN (left and right inputs) and the LR OUT (outputs). The display
also illustrates the routings between the Blocks. In addition to the Block functions,
there is a set of Modulations which may be used in a Program. These allow MIDI
messages (such as note numbers, velocity, after-touch, pitch-bend or controllers) to
serve as controls over parameters in the QuadraVerb 2. This is discussed in further
detail in chapter 6. For now, let’s discuss the essence of Blocks and how they interact
with each other.
What is a Block?
A Block is essentially a discrete effects processor that can be used alone or in
conjunction with other Blocks. Each Block has a Mono input and up to three outputs
(depending on its type): left, right and mix. A Block requires that a signal be routed to
it before it can effect the signal. The Block must also have its output connected either
to the L OUT or R OUT (or both), or to the input of another Block (or to a series of
Blocks) which is in turn connected to either the L OUT or R OUT (or both) before the
Block’s effect can be heard.
Overview - Chapter 3
The four effect functions available in a Block are: Equalization, Pitch, Delay and
Reverberation. Each one of these has several effect types.
assigned to use a Pitch function, you can choose a Chorus, Pitch Shifter, Flanger,
etc. A full list of all the available effects and their parameters is shown in Chapter 5.
Example:
Once a Block is
Selecting and Editing Blocks
Editing a Program is done by first selecting one of the eight Blocks, and then
selecting a Block function (Type, Routing, Parameter, or Mix). Use the [< BLOCK >]
buttons to move the pointer in the display to the left or right. The pointer appears as a
down-pointing triangle just above the Blocks, thereby selecting one of the eight
Blocks or the L OUT or R OUT (the L OUT and R OUT are special Blocks which aren’t
really edited, except when adjusting the
Block is being edited.
There are four Block functions, which are accessed by using the four Block function
buttons: [TYPE], [ROUTING], [PARAMETER], and [MIX]. Pressing any of these
buttons takes you to its related parameters, and simultaneously turns on the button’s
LED to indicate the selected Block function.
TYPE. The Type function is where you go first to define a Block. A Block is defined
as either EQ, Pitch, Delay, Reverberation or Off. This is done in Type Page 1. Once a
Block is defined, its effect type can be selected. This is done in Type Page 2. If you
need to move a defined Block to another position, you would go to Type Page 3.
ROUTING. Once a Block is defined, you must select its input source and route its
outputs either to another Block’s input or to the L OUT or R OUT. This is done in
Routing Page 1. Once an input source is selected, you can adjust its level feeding to
the Block’s input using Routing Page 2. If you decide to delete a routing that has
already been added, you will use Routing Page 3.
mix
). The pointer’s position indicates which
QuadraVerb 2 Reference Manual 27
Chapter 3 - Overview
PARAMETER. This is where you adjust the selected Block’s parameters. The
number of pages available and the parameters found in them will be determined by
the Block’s type. Some effect types have only one or two parameters on a single
page; while other effect types (particularly reverbs) use all nine pages, with as many as
four parameters on a single page.
MIX. The Mix function provides three parameters on three separate pages. When a
defined Block is selected, Mix Page 1 lets you adjust its level going to the LR
Outputs. Page 2 lets you adjust the Direct Signal Level, and Page 3 lets you adjust
the Master Effects Level. If, however, an undefined Block is selected, or the LR OUT
is selected, there will only be two pages available in the Mix function (Direct Signal
Level, and Master Effects Level).
Once a Block function is selected, use the [< PAGE >] buttons to scroll through the
various pages within a Block function. The number of available pages will vary from
function to function. The left side of the display will indicate the total number of pages
within the selected Block function. The page currently being displayed will be
underlined.
When you find a parameter you wish to edit, turn the [VALUE/ENTER] knob until the
desired value is displayed. If the new value flashes in the display, it means you must
press the [VALUE/ENTER] button to select the new value.
Routing “Patch Cords” Between Blocks
The concept of routing involves selecting inputs for each active Block (1 through 8)
and L OUT and R OUT, and then adjusting the input levels of those routings you are
using. The [ROUTING] button will let you create “patch cords” that connect the input
jacks to the Blocks, or the Blocks to other Blocks, and finally to the output jacks. You
may select the Left Input, Right Input (analog or digital inputs), or the output of a
Block: L (left), R (right) or M (mix). You can even route a Block’s M (mix) output back to
its own input, which can be used to create some rather stunning effects, but the level
setting for doing this is critical to avoid unwanted feedback.
Keep in mind that each Block can have many inputs, coming from various sources. All
routings are considered “input patch cords”; i.e., you can only make a route from the
destination Block.
5 (not Block 2) using the [< BLOCK >] buttons and then select Block 2’s output as an
input source.
If the Global Direct Signal Mute function is turned on, any Programs which have the LR IN routed
to the LR OUT will not display these “patch cords” except when editing the Program’s routings.
This is to avoid confusion when operating in this
mode. For more information on Global Direct Signal Mute, see chapter 2.
Example:
To set a route from Block 2 to Block 5, you’d select Block
J
28 QuadraVerb 2 Reference Manual
Overview - Chapter 3
Setting the Routing Levels
Each time you add a “patch cord” to a Program, the QuadraVerb 2’s display
automatically prompts you to set its level. This is done by adjusting the attenuation
level between -48dB and +0dB, or OFF. When set at +0dB, the signal is allowed to
pass through at full volume, with no attenuation. When set to OFF, the signal is fully
attenuated and will not be heard at the “patch cord’s” destination.
The default level for a newly added “patch cord” is -6dB. This provides you with ample
headroom for most applications. The ideal level, however, should be as high as
possible without causing distortion. There are basically three places in the
QuadraVerb 2 that can distort: at the input A/D converter, within the blocks, and at
the output. The routing levels within a well-designed program are set so that none of
these three will distort before the other ones do. If the input is clipping, it doesn't
matter if you've attenuated levels feeding from the input to a block--it will still distort.
Input clipping is controlled by the front panel INPUT LEVEL controls. Block clipping
can be caused by routing levels to the block that are too high, or by processing within
the block itself (for example, a boost in EQ, resonance in a chorus, or feedback in a
delay). Output clipping can be controlled using the Master Effects Level parameter in
the [MIX] function. The OUTPUT LEVEL control is analog, and cannot lower the
distortion caused when the output of multiple blocks are too loud for the output D/A
converter to handle.
Keep in mind when setting routing levels that each time you double the number of
sources, the output rises 6 dB. If there are four blocks feeding another block, those
routes may all need to be set to -12 dB to avoid clipping. On the other hand, if a
program consists of a single delay or reverb block, input and output routings may be
set to 0 dB without distortion.
It is also important to note that each “patch cord” in a Program uses 1% of the total
DSP power available. However, if the signal is attenuated (by setting the level below
+0dB), 2% of DSP is used. The following section discusses how the QuadraVerb
reacts when DSP is nearly fully taxed. One way to free up more DSP power when you
need it is to set some or all of your “patch cord” levels to +0dB.
The LR IN
These appear on the far left side of the Block section in the display. They are not
selectable with the [< BLOCK >] buttons. This is because we are always routing from
the LR IN and, in keeping with our convention, all routing is done from the destination
Block, not from the source.
Reaching the Outputs - LR OUT
The L OUT and R OUT are separately selectable (like Blocks) for routing purposes.
Whichever Block is determined to be the final effect in the chain (whether your
Program has one or multiple Blocks), it needs to be routed to the LR OUT in order for
you to hear it . This can be done in mono (if just one channel is needed) by routing
one or more Block outputs to either the L OUT or R OUT, or in stereo by routing to
both the L and R OUT.
Limit Handling
Within the limits of the available sample memory and DSP, the Blocks can be linked in
any order, in almost any combination of the four basic types. For instance, you might
have two EQ Blocks followed by four pitch Effect Blocks; or one Block of each (EQ,
QuadraVerb 2 Reference Manual 29
Loading...