Lexicon LXP-15 Owner's Manual

LXP-15

Multi-Effects

Processor Owner's

Manual

Unpacking and Inspection

After unpacking the LXP-15, save all packing materials in case you ever need to ship the unit. Thoroughly inspect the LXP-15 and packing materials for signs of damage. Report any shipment damage to the carrier at once; report equipment malfunction to your dealer.

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.

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.

WARNING:

TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THE UNIT TO RAIN OR MOISTURE.

Copyright 1991

All Rights Reserved.

Lexicon Part #070-07831 Rev 1

WARNING:

DO NOT DEFEAT OR REMOVE GROUND PIN ON THE POWER PLUG.

Lexicon Inc.

3 Oak Park

Bedford, MA 01730 USA

Telephone [phone]

Fax [phone]

Safety Suggestions

Read Instructions Read all safety and operating instructions before operating the unit.

Retain Instructions Keep the safety and operating instructions for future reference.

Heed Warnings Adhere to all warnings on the unit and in the operating instructions.

Follow Instructions Follow operating and use instructions.

Heat Keep the unit away from heat sources such as radiators, heat registers, stoves, etc., including amplifiers which produce heat.

Ventilation Make sure that the location or position of the unit does not interfere with its proper ventilation. For example, the unit should not be situated on a bed, sofa, rug, or similar surface that may block the ventilation openings; or, placed in a cabinet which impedes the flow of air through the ventilation openings.

Wall or Ceiling Mounting Do not mount the unit to a wall or ceiling except as recommended by the manufacturer.

Power Sources Connect the unit only to a power supply of the type described in the operating instructions, or as marked on the unit.

Grounding or Polarization* Take precautions not to defeat the grounding or polarization of the unit’s power cord.

*Not applicable in Canada.

Power Cord Protection Route power supply cords so that they are not likely to be walked on or pinched by items placed on or against them, paying particular attention to cords at plugs, convenience receptacles, and the point at which they exit from the unit.

Nonuse Periods Unplug the power cord of the unit from the outlet when the unit is to be left unused for a long period of time.

Water and Moisture Do not use the unit near water — for example, near a sink, in a wet basement, near a swimming pool, near an open window, etc.

Object and liquid entry Do not allow objects to fall or liquids to be spilled into the enclosure through openings.

Cleaning The unit should be cleaned only as recommended

by the manufacturer.

Servicing Do not attempt any service beyond that described in the operating instructions. Refer all other service needs to qualified service personnel.

Damage requiring service The unit should be serviced by qualified service personnel when:

the power supply cord or the plug has been damaged,

objects have fallen, or liquid has been spilled into the unit,

the unit has been exposed to rain,

the unit does not appear to operate normally or exhibits a marked change in performance,

the unit has been dropped, or the enclosure damaged.

Outdoor Antenna Grounding If an outside antenna is connected to the receiver, be sure the antenna system is grounded so as to provide some protection against voltage surges and built-up static charges. Section 810 of the National Electrical Code, ANSI/NFPA No. 70-1984, provides information with respect to proper grounding of the mast and supporting structure, grounding of the lead-in wire to an antenna-discharge unit, size of grounding conductors, location of antenna-discharge unit, connection to grounding electrodes, and requirements for the grounding electrode. See figure below.

Power Lines An outside antenna should be located away

		Antenna Lead-in
		Wire
	Ground
	Clamp
		Antenna Discharge
		Unit (NEC Section
	Electric	810-20)
	Service	Grounding Conductors
	Equipment
		(NEC Section 810-21)
		Ground Clamps
		Power Service Grounding
		Electrode System
	NEC — National Electrical Code	(NEC Art 250, Part H)

from power lines.

LXP-15

Multi-Effects

Processor Owner's

Manual

Contents

Introduction
1. Installing the LXP-15
Unpacking • Mounting • Power ........................................................................	1-1
Front Panel Controls ........................................................................................	1-2
Rear Panel Connectors....................................................................................	1-3
MIDI Connections ............................................................................................	1-4
Audio Connections ...........................................................................................	1-4
2. Front Panel Operation
Definition of terms ............................................................................................	2-1
Setting Audio Levels ........................................................................................	2-2
The LXP-15 Display .........................................................................................	2-3
The Page Knob ................................................................................................	2-4
Presets and User Setups .................................................................................	2-5
Selecting LXP-15 presets • Loading a preset • Modifying a preset
Naming your new setup • Storing a new sound • Recalling a register
System Parameters .........................................................................................	2-8

3.The Algorithms

	Signal Flow ......................................................................................................	3-1
	Delay/Reverb ...................................................................................................	3-3
	Pitch/Delay .......................................................................................................	3-6
	Gate .................................................................................................................	3-9
	Plate ...............................................................................................................	3-11
	Chorus Delay .................................................................................................	3-13
4.	Creating Sounds and Effects
	Sounds and Effects ..........................................................................................	4-1
	Patching ...........................................................................................................	4-6
	Global and General Purpose Patches ...........................................................	4-13
	Setting up Global Patches .............................................................................	4-14
	Setting up General Purpose Patches ............................................................	4-16
	Patching Examples ........................................................................................	4-21
5.	The Presets
	About the presets .............................................................................................	5-1
	Presets 1-52.....................................................................................................	5-2
	Presets 53-96 ...................................................................................................	5-3
	Presets 97-128 .................................................................................................	5-4
6.	MIDI Operation
	Selecting a MIDI Channel ................................................................................	6-1
	Accessing Registers and Dynamic MIDI® ......................................................	6-1
	Controller quirks • MIDI Tempo control • Slaving to two or more
	LXP-15s • Creating SysEx Patches using MIDI SysEx
	The MIDI Page .................................................................................................	6-4

7.MIDI Implementation Data

	Data/Event Requests .......................................................................................	7-1
	Transmit/Receive Data ....................................................................................	7-2
	Data Dump Contents .......................................................................................	7-4
	Parameter Definitions ......................................................................................	7-5
	Microcode Parameters .....................................................................................	7-8
	Implementation Chart .....................................................................................	7-13
8.	Troubleshooting
	Low Voltage • Overheating • Common MIDI Problems ....................................	8-1
	Restoring Factory Presets and Registers ........................................................	8-2
9.	Specifications
	Tempo to Delay Time Conversion
	User Program Log Sheet

Introduction Congratulations on your purchase of the LXP-15 Multi-Effects Processor! You are about to experience superb sound quality and a full range of reverb, pitch

shifting, and delay effects, coupled with fast, intuitive editing of preset sounds and an industry-leading MIDI implementation.

The LXP-15 offers a rich and distinctive palette of special effects, including 128 preset effects programs to get you started. Each program has up to five display pages of variable parameters that you can adjust for subtle or dramatic changes in the program’s sound, and you can store as many as 128 customized programs in user memory. All of the LXP-15 functions are accessible from the front panel, or via MIDI, providing truly world-class flexibility and control. From pitch shifting to stereo delays and flanging, the LXP-15 delivers superior performance. Whether you are a producer, engineer, or musician— whether you work on stage or in the studio— the LXP-15 will quickly become an indispensible part of your sound.

We’re confident you’ll find that the LXP-15’s unique combination of state-of-the- art sound and extraordinary versatility is exactly what you’re looking for. A Quick Reference card provides the basics of operation in a compact format to get you up and running as quickly as possible — but 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, program descriptions, and complete MIDI Implementation data — all the information you need to access the full power of the LXP-15.

Installing the LXP-15

1

Installing the

LXP-15

After unpacking the LXP-15, save all packing materials in case you ever need Unpacking to ship the unit. Thoroughly inspect the LXP-15 and packing materials for signs

of damage. Report any shipment damage to the carrier at once. The following accessories are included with the LXP-15:

1.Power Cable

2.Feet (for use if not rack-mounted)

3.Owner's Manual

4.Quick Reference Guide

5.Warranty card (USA only)

Connect the cable end of the LXP-15 line cord to the LXP-15 power connector. Power Then plug the line cord into an appropriate AC wall socket.

The LXP-15 measures 19"W x 1.75"H x 13.9"D (483 x 45 x 353 mm). Make sure Mounting that the LXP-15 is securely screwed into the rack, and that support is provided

for the rear of the chassis during transport to avoid possible damage from severe mechanical shock.

The maximum ambient operating temperature is 95° F (35° C). Provide adequate ventilation if the LXP-15 is mounted in a closed rack with heat-producing equipment such as synthesizer modules, effects units, or power amplifiers. Avoid mounting the LXP-15 directly above power amplifiers.

1-1

LXP-15 Owner's Manual	Lexicon

LXP-15

Front Panel

Controls

Input

Sets the audio input level.

Output

Controls the signal level sent to the LXP-15 outputs.

View
Used to display alternate	POWER
screen information.	Power on/off.

INPUT	OUTPUT HEADROOM	ADJUST	Reverb PAGE	Level	POWER
			Pitch/EQ	Mod
	OVL		Dly	Alg
exicon	12		Setup	Patch 1	LXP-15
	18		Store	Patch 2
	24		Name	Patch 3
	VIEW		Global	Patch 4
			MIDI	Sys

Headroom

Green LEDs indicate signal present; red LED indicates the signal is -3dB from peak overload, or at processor overload .

Soft buttons

Each of these five buttons is used for assigning the parameter displayed directly above it to ADJUST knob control.

Adjust

Used to edit paramaters displayed and selected with the Soft buttons.

Page knob

Used for selection of 16 display pages

1-2

Installing the LXP-15

LXP-15

Rear Panel

Connectors

MIDI IN

Receives MIDI information from other MIDI equipment such as master keyboard controllers, MIDI foot controllers, sequencers and synthesizers.

MIDI THRU	MIDI OUT
Passes any MIDI data re-	Transmits	MIDI data to
ceived without change.	other equipment.

Outputs (L and R)

Single-ended (unbalanced) stereo outputs provide +4dBu nominal output level. Either can be used for mono output.

		Dynamic MIDI			FOOT				AUDIO
					CONTROLLERS
	IN	THRU	OUT					L OUTPUTS R	L INPUTS R
				2	3	4	5
			1

AC PWR

AC Power	Foot Controllers
	Five connectors for toggle
	(Push on/push off) mo-
	mentary	contact foot
	switches,	or continuous
	footpedals (50 kΩ ).

Inputs (L and R)

Single-ended (unbalanced) inputs accept levels as low as -26dBu. Input impedance is 50 kΩ in stereo, 25 kΩ in mono. Either can be used for mono input.

1-3

LXP-15 Owner's Manual	Lexicon

MIDI Connections

Audio Connections

MIDI connections are dependent on your applications, and on the equipment available in your system. For examples of MIDI system connections, see Chapter 6: MIDI Operation.

This section outlines several connection possibilities for the LXP-15. Because each sound system is unique, we recommend experimentation to arrive at the best configuration for your system. Always check connections for proper impedance, polarity, and levels.

Audio connections to the LXP-15 are unbalanced, and should be made with high quality shielded cables with 1/4" tip-sleeve phone jacks at the LXP-15 end. The connectors must be wired as shown below:

Sleeve - Shield/Ground

Tip - High

If only 1/4" tip-ring-sleeve phone jacks are available, they must be wired as shown:

Sleeve - Shield/Ground

Tip - High

Ring - Connect to Sleeve

Mono or stereo? The LXP-15 produces wonderful stereo effects from either mono or stereo signal sources. For mono sources, use either of the two input connectors; the dry signal appears (along with the stereo effects) in mono at both output connectors. For instruments and sources with stereo outputs, use both inputs. We recommend using both LXP-15 outputs whenever possible but, if mono output is required, you can use just one of the two output connectors. When only one output is used, the left and right signals are summed internally .

Some of the examples on the following pages use stereo instruments and amplification systems, others use mono. Feel free to adapt the examples to your specific requirements.

1-4

Installing the LXP-15

Connection to a mixing console's effects sends

Channel Input or

Effects Return (R)

Channel Input or

Effects Return (L)

Effects

Send

Input
(L or R)	L Output R Output

INPUT	OUTPUT HEADROOM	ADJUST	Reverb	PAGE	Level	POWER
	OVL		Pitch/EQ		Mod
			Dly		Alg
exicon	12		Setup		Patch 1	LXP-15
	18		Store		Patch 2
	24		Name		Patch 3
	VIEW		Global		Patch 4
			MIDI		Sys

If you will be using an LXP-15 as your primary effects unit, and your system includes a console with one or more auxiliary (effects) sends, connect the LXP15 as shown above. In most applications, it is preferable to connect the LXP-15 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 LXP-15 program's MIX control should be set to 100% wet.

1-5

LXP-15 Owner's Manual	Lexicon

Connection between instrument and console

Channel Input (pan right)

Channel Input (pan left)

LXP-15

LXP-15

L Output

R Output

INPUT

OUTPUT HEADROOM

ADJUST Reverb PAGE

Level

POWER

Pitch/EQ

Mod

OVL

Dly

Alg

exicon

12

Setup

Patch 1

LXP-15

18

Store

Patch 2

24

VIEW

Name

Patch 3

Global

Patch 4

MIDI

Sys

In

In

Synth

Synth

L Output

R Output

In some applications (such as when an LXP-15 is used for a single instrument) it may be desirable to patch the LXP-15 between the instrument and console. This makes it possible to keep the LXP-15 up on stage with other MIDI gear, rather than in the console effects rack, making MIDI control much easier.

Set the LXP-15 MIX control to approximately 50%.

1-6

Installing the LXP-15

Connection between instrument and amplifier

Guitar

Output

LXP-15 Input

(L or R)

INPUT	OUTPUT HEADROOM	ADJUST	Reverb	PAGE	Level	POWER
			Pitch/EQ		Mod
	OVL		Dly		Alg
exicon	12		Setup		Patch 1	LXP-15
	18		Store		Patch 2
	24	VIEW	Name		Patch 3
			Global		Patch 4
			MIDI		Sys
	LXP-15	LXP-15
	L Output	R Output

	Amp	Amp
	L Input	R Input

For a very spacious guitar sound, connect the LXP-15 between a guitar and two amp and speaker stacks. Set the LXP-15 MIX control to approximately 50%. The only problem with this setup is that if you use overdrive distortion created by the amplifier, changing settings on the LXP-15 also affects the quantity and quality of your distortion. If you use a separate distortion box, you can get around this problem by connecting it before the LXP-15. If you prefer amplifier-generated distortion, try the setup shown on the next page.

1-7

LXP-15 Owner's Manual	Lexicon

Connection between instrument preamp and power amplifier(s)

WARNING! Never connect speaker outputs from a guitar amp to the LXP-15. Doing so can cause serious damage which is not covered by the LXP-15 warranty. On some guitar amplifiers it is very easy to accidentally use a speaker output instead of a direct or effects output. BE CAREFUL!

	Amp or	Direct or
Guitar	Preamp
		Preamp output
Output	Input
		LXP-15 Input (L or R)
	INPUT	OUTPUT HEADROOM	ADJUST	Reverb	PAGE	Level	POWER
				Pitch/EQ		Mod
		OVL		Dly		Alg
	exicon	12		Setup		Patch 1	LXP-15
		18		Store		Patch 2
		24		Name		Patch 3
		VIEW		Global		Patch 4
				MIDI		Sys
		LXP-15	LXP-15
		L Output	R Output
		Amp	Amp
		L Input	R Input

L and R Speaker Outputs from Power Amp

If you use overdrive distortion, it's usually better to create the overdrivebefore sending the signal to the LXP-15 to ensure that the effects don't change the quantity and quality of your distortion. In this setup, you need a guitar preamplifier or a guitar amp with a direct output. Feed this signal to either of the LXP15 inputs, and then on to a stereo power amp or a pair of guitar amps. (A few guitar amplifiers become unhappy if they are operated without speakers connected. Consult the amp manufacturer for details.)

You can use the effects send and return connectors on a mono guitar amp to obtain similar results. Adjust the LXP-15 output level so that the amp produces the same output with the LXP-15 as it does without it.

1-8

Installing the LXP-15

Connection between drum machine and console

Console

Inputs

Console

Inputs

LXP-15 Outputs

(L and R)

INPUT	OUTPUT HEADROOM	ADJUST	Reverb	PAGE	Level	POWER
			Pitch/EQ		Mod
	OVL		Dly		Alg
exicon	12		Setup		Patch 1	LXP-15
	18		Store		Patch 2
	24		Name		Patch 3
	VIEW		Global		Patch 4
			MIDI		Sys

LXP-15 Outputs

(L and R)

INPUT	OUTPUT HEADROOM	ADJUST	Reverb	PAGE	Level	POWER
			Pitch/EQ		Mod
	OVL		Dly		Alg
exicon	12		Setup		Patch 1	LXP-15
	18		Store		Patch 2
	24		Name		Patch 3
	VIEW		Global		Patch 4
			MIDI		Sys

LXP-15 Inputs

LXP-15 L Input

(L and R)

Drum machine's

Drum machine's individual

stereo outputs

output for snare drum

Using two LXP-15 units between your drum machine and console can make your drum machine sound much more exciting, since it allows you to process the allimportant snare drum separately from the rest of the mix. Make sure you remove the snare from the drum machine's main stereo mix.

1-9

LXP-15 Owner's Manual	Lexicon

1-10

Front Panel Operation

2

Front Panel

Operation

Terms used in this manual

Algorithm The LXP-15 contains several algorithms. An algorithm is a set of instructions that tells the LXP-15's microprocessor how to process the input signal. One algorithm produces pitch/delay, another produces gated reverb, etc.

Parameter Each algorithm has a set of parameters (controls) that uniquely characterize it. The settings of the parameters can be changed to create radically different sounds from a single algorithm.

Program Parameter values are stored/recalled in setups. Some examples are: delay time, pitch shift, etc.

System Parameter values are not associated with a particular setup. System parameters are not stored in registers or presets, nor do their values change when a new setup is recalled. Examples are: display contrast and brightness, MIDI Channel number, etc.

Patch A patch is a routing assignment that allows an LXP-15 parameter to be driven by a source control such as a footpedal, or a synthesizer mod wheel.

Setup A setup is a collection of specific parameter values responsible for a certain sound (and as many as four general purpose patches). Each register or preset is a setup, as is the current state of the machine.

Pages Pages are groups of parameters (or other quantities) whose names and/or values are displayed simultaneously.

Register/Preset The LXP-15 contains 256 setups. 128 of these are presets which are useful setups permanently initialized at the factory; 128 are registers which are available for storing your own setups and effects. The factory presets cannot be overwritten, but they can be modified and stored into registers (or copied into registers, then modified). When shipped, the LXP-15 already has a duplicate of the presets loaded into its registers.

2-1

LXP-15 Owner's Manual	Lexicon

Setting Audio Levels The wide range of adjustment available with the LXP-15 INPUT and OUTPUT controls allow it to be used with virtually any kind of equipment found in the studio

or on the road.

To set audio levels:

1.Turn the LXP-15 INPUT and OUTPUT controls all the way down (fully counterclockwise).

2.Set the instrument output, preamp output, or effects send that feeds the LXP-15 input(s) to a nominal level. With an instrument, this should be your loudest normal playing level; with a preamp output or console, adjust the output(s) or effects send(s) to produce the highest level possible with the least amount of noise. If the output you are using doesn't have a level control, don't worry about it!

3.While sending audio to the LXP-15, gradually turn up the INPUT control until the red OVL LED just flashes on the loudest peaks. If it flashes continuously, turn the INPUT control down slightly. This ensures the best possible signal- to-noise ratio and dynamic range.

In general, it is best to set the gains in your system so that the nominal input to the LXP-15 is at least 12dB from the maximum converter (peak) level.

Green LEDs should be lit.

OVL LED flashes on peaks; INPUT level should be set to the level where the OVL LED flashes briefly on the loudest peaks only.

HEADROOM

OVL

12 18 24

Note: If the OVL LED flashes with no input present it indicates processor overload is occurring.

4. Turn the LXP-15 OUTPUT control up.

2-2

Front Panel Operation

On most of the LXP-15 display pages, three lines of alphanumeric information The LXP-15 Display are available:

1.System status

2.Parameter names

3.Parameter settings

The front panel VIEW button allows you to choose between display of the first and second, or the second and third lines.

Pressing VIEW

This	line	shows	system status
Params	appear	on	this line

VIEW

Params

appear

on

this

line

Param

values

are

shown

here

allows you to alternate these displays.

VIEW

Each display line is divided into five 7-character fields. This allows as many as five items to be displayed simultaneously.

1234567 1234567 1234567 1234567 1234567

1234567 1234567 1234567 1234567 1234567

In general, pressing the button below any display field will select the item in that field for modification by the ADJUST knob.

Pitch	Intervl PchFine		HiCut	LoCut
On	Fifth	0	320Hz	1.35kHz

In this example pressing this button has

ADJUST

selected "HiCut". The value of this parameter is bracketed by arrows to highlight its selection.

Pitch	Intervl PchFine		HiCut	LoCut
On	Fifth	0	1.15Hz	1.35kHz

Turning the ADJUST knob alters the value of the selected item.

2-3

LXP-15 Owner's Manual	Lexicon

The Page Knob The PAGE knob has 16 labeled settings. These selections are grouped into three basic functional areas. The upper section provides for selection of the available parameters which define the sound of each algorithm (Reverb, Pitch EQ, Delay, Level, Modulation, and Algorithm).

Reverb		PAGE		Level
Pitch/EQ				Mod
Dly				Alg
Setup			Patch 1
Store			Patch 2
Name			Patch 3
Global			Patch 4
MIDI				Sys

The settings grouped on the lower left allow various routine functions to be performed on setups (recalling, storing, naming, specifying MIDI Channel, etc.) These pages do not have an alternate display.

System parameters, and patch assignments are selected at the settings grouped on the lower right.

2-4

Any one of 128 preset setups can be selected by the PAGE and ADJUST knobs on the front panel. To select a preset, first turn PAGE to SETUP.

The following display will appear:

Preset #	Name	alg: XX
Preset	Registr	Pre scan Reg scan	Load

If you press the button directly below "Preset" the ADJUST knob will scroll through (and sequentially load) each one of the 128 presets. Pressing "Pre scan" allows you to use the ADJUST knob to simply scroll through the list of preset names without loading them. If you use this method, you must press the button beneath "Load" to actually select a preset. (Viewing, selecting and loading registers follow exactly the same procedure.)

For quick reference, the names of the 128 presets are shown in the table below. The presets are generally grouped as follows: 1-78 general purpose; 79-86 guitar or bass; 87-102 guitar or keyboards; 103-117 keyboards; 118-128 special effects. For now, pick any one to try it out. (The first 50 or so should be generally useful and do not make extensive use of patched parameters).

Front Panel Operation

Presets and User

Setups

Selecting LXP-15 presets

Reverb		PAGE		Level
Pitch/EQ				Mod
Dly				Alg
Setup			Patch 1
Store			Patch 2
Name			Patch 3
Global			Patch 4
MIDI				Sys

Use PAGE to select "SETUP".

Press "Preset", then use ADJUST to select and load a specific preset.

or

Press "Pre scan", then use ADJUST to scan the presets. Press "Load" toselect any displayed preset.

1	Large Hall	33	Bright Gate	65	Jumpin' Beans	97	Drop Tail Env<
2	Bright Hall	34	Slap Gate	66	Thru A Ringr	98	VaryRes1Foot
3	Dark Hall	35	Short Slap	67	LFO Roll	99	Pedal1Reverb
4	Large Room	36	Tap Detune	68	Thick Chorus	100	VaryCaveFoot
5	Large Drk Room	37	Ambi Detune	69	Gtr:Eko-Room	101	PtchLoopFoot
6	Medium Room	38	Ambi Delay	70	Sizzle Verb	102	PedalWhammy1
7	Medium & Short	39	Long Delay	71	Dly Gate Rite	103	XDly RvrbMod
8	Medium Room 3	40	L&R Delays	72	Thick'r Gate	104	VaryCaveMod
9	Med & Bright	41	1/4 Note MAT	73	Deep End	105	ConvrtRvbMod
10	Small Room	42	1/8 1/16 MAT	74	Jazz Swing Dly	106	ConvrtDlyMod
11	Small Room 2	43	Space Echo	75	Glub .… Glub	107	8Va CloudMod
12	No Room	44	Delay Cloud	76	SoftLoopFoot	108	VaryRes2Mod
13	Small & Bright	45	Ambi Tap 5th Up	77	DlyLoopFoot	109	Mod Whammy1
14	Dark Closet	46	Roomy 4th Dwn	78	ChrsLoopFoot	110	XDelay Aft
15	Large Dly Room	47	Roomy Oct Up	79	AmbiChrEnv<	111	ConvrtRvbAft
16	Med Dly Room	48	Chorus	80	AmbiChrEnv>	112	SpacOctUpAft
17	1/4 Verb MAT	49	Chorus Too!	81	ShortAmbiDly	113	8Va CloudAft
18	Dark Dly Room	50	Chorus & Doubl	82	LongAmbiDly	114	AftFlngVerb
19	Small & Delay	51	Slap & Chorus	83	EnvDetune2	115	Big Flush
20	Vocal Room	52	Chorus & Delay	84	EnvDetune3	116	DlyLoopMIDI
21	Vocal 36	53	Detune Chorus	85	RoomChrEnv	117	SpacLoopMIDI
22	Late Vocal	54	Small & Flange	86	Spacious5th^	118	XDelayEnv<
23	Vocal Plate	55	Flange Room	87	Bounce Rvrb	119	Bounce Wave
24	Plate	56	Piano Flange	88	Rvrb XDly	120	DlyCloudEnv>
25	Small Plate	57	Mix Jizzn'	89	XDly Rvrb	121	RvrbWarpEnv>
26	Long Plate	58	Image Wander	90	Fade In Box	122	Gated Dive
27	Plate 15	59	Wander Fast	91	Fade In Chorus	123	MoanVerb
28	Brite Plate	60	Wander Room	92	Fade In Space	124	Oddness
29	Dark Plate	61	Wander&Small	93	Fade In Room	125	Rising Cloud
30	Small Gate	62	Small&Fast	94	Cascade8 1	126	Cascad8Env>
31	Medium Gate	63	Image Detune	95	Cascade8Env<	127	Le Boom
32	Large Gate	64	Wide Image	96	Glass 3	128	Bypass

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The setup name is now marked to show that it has been modified

LXP-15 Owner's Manual	Lexicon

Loading a preset

Modifying a preset

If you have chosen a preset with "Pre scan" selected, press the button directly below "Load" to load it. If you made your selection with "Preset" selected, you're all set, since this mode automatically loads the preset you've selected. (For footswitch control of preset changes, see Chapter 4: Creating Sounds and Effects)

Once you've selected a preset, turn the PAGE knob to select one of the six parameter pages (Delay, Pitch/EQ, Reverb, Level, Mod or Alg). One page of parameters will appear on the display.

	Preset 2	Bright Hall		alg: Dly/Rvb
Decay	Treble	Bass Mpy	Size	Diffus

The PAGE knob will step through the other available parameter pages. You can change the value of any parameter by selecting it (push the button directly beneath it) and then turning the ADJUST knob to a new value.

When you turn the ADJUST knob, the bottom line of the display will change to show the full name of the selected parameter and the selected value. These values will change as you continue to turn ADJUST.

Preset 2	Bright Hall		alg: Dly/Rvb
Decay Time		3.6s
Full name of selected			Parameter value - this will
parameter.			change as you turn ADJUST.

The screen will return to its normal 5-parameter display if you select another parameter, or if 2 seconds pass without further parameter adjustment.

When the display returns to its normal state the setup name will be marked with an asterisk to indicate that the setup has been modified. This asterisk will remain until the setup is stored, or until another setup is loaded (clearing this setup and any changes made to it).

	Preset 2	*Bright Hall		alg: Dly/Rvb
Decay	Treble	Bass Mpy	Size	Diffus

Remember that pressing VIEW will display the parameters along with their settings.

Decay	Treble	Bass Mpy	Size	Diffus
3.6s	8.98kHz	0.71x	64Meter	75%

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Front Panel Operation

If you want to keep this modified preset as a new setup, it is a good idea to assign Naming your new setup it a new name before storing it. To change the name of a setup, turn PAGE to

"Name". The following display will appear.

Preset #	Name Edit:		Bright Hall
<Char	Char>	-	-	-

Note that the first letter of the current setup name is underlined by a cursor, indicating that it is selected. Turning the ADJUST knob allows you to replace this character with the first letter of the name you want. The ADJUST knob dials sequentially through a list of alphanumeric characters in the following order: (space), 0-9, A-Z, a-z, and an assortment of standard symbols. Pressing the buttons under "<Char" and "Char>" will step the cursor to the left and right, allowing you to choose the characters you want to change.

After creating a new sound, and assigning it a name, you may want to save it for Storing a new sound future use in one of the LXP-15's 128 registers. — New entries will overwrite any

program stored at that location, so be careful not to store into a location that contains a setup you want to save. (We have provided a chart for you to record your own program entries at the end of this manual.)

To store a setup, turn PAGE to "Store". The following display will appear.

Store into Registr XX			Briter Hall	?
Reg #	-	-	-	Store

If the register shown on the top line of the display contains a setup you want to keep, select "Reg #" and turn ADJUST to a register you don't mind overwriting. When the display shows the register you want, simply press the button beneath "Store". Successful storage is indicated by the following display:

Stored	Registr XX		Briter Hall
Reg #	-	-	-	Store

Note: The LXP-15 will not perform a store instruction if memory write-protect is enabled (see next page), or if you accidentally try to store into a Preset location.

To recall a register, simply turn PAGE to "Setup", select "Registr" and dial the Recalling a register ADUST knob to the register you want. The setup is automatically recalled and

ADJUST may be used to modify the sound. (For footswitch control of setup changes, see Chapter 4: Creating Sounds and Effects.)

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LXP-15 Owner's Manual	Lexicon

System Parameters

MIDIchn

To access LXP-15 System Parameters,simply turn the PAGE knob to "Sys". The following display will appear:

MIDIchn	Contrst	Bright	MemProt	Update
(1-16,OMNI)	(1-16)	(0-15)	(On/Off)	(On/Off)

Pressing the button directly beneath any of these displayed items will select that item for alteration with the ADJUST knob.

This control sets the MIDI channel. When selected, the ADJUST knob allows you to choose MIDI Channels 1-16 (for both transmitting and receiving MIDI data), or to choose OMNI (messages received on all channels and transmitted on Channel 1).

Contrst

Bright

Memory Write-Protect

Adjusting the contrast of the display allows you to optimize it for different viewing angles.

The LXP-15 has 15 brightness levels to allow adjustment for different lighting conditions.

Memory Write-Protect is a feature that lets you prohibit the overwriting of the setups stored in the registers. If the write-protect function is enabled, any attempt to store to a register will cause the following display to appear:

Registr XX		Name not stored !
Reg #	-	-	-	Store

Selecting "Mem Prot" in System Parameter mode allows you to choose ON or OFF with the ADJUST knob.

Update This feature allows you to choose continual display update of patched parameter values (ON), or display of only the base values of patched parameters (OFF). See Chapter 4: Creating Sounds and Effects for details on patched parameters.

Note: Selection of Display Update ON will slow down the operation of the LXP15 considerably. It is primarily useful when setting up patches, after which it is recommended that it be turned OFF.

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The Algorithms

3

The Algorithms

The LXP-15 contains five effects algorithms: Delay/Reverb, Pitch/Delay, Gate, Plate, and Chorus Delay. When a preset or register is loaded, its algorithm is shown in the top line of the display. (See Chapter 5: The Presets for a list of the algorithms used in each preset.)

The algorithm parameters are grouped by function onto five pages: Delay, Pitch EQ, Reverb, Levels and Mod. This format allows you to find the delay parameters, for example, at the same page and display location in each algorithm. Parameters which are not available in an algorithm are assigned a blank space to maintain this format.

NOTE: You can change the current algorithm by turning the PAGE knob to "Alg" and using ADJUST to select a different algorithm. Be aware that different algorithms have different parameters. Changing algorithms with ADJUST may cause some parameters to be set to undesireable values. For this reason, when you want to work with a different algorithm, select and load a preset or register with the desired algorithm. This ensures that all parameters are set to normal values.

The general signal flow through the LXP-15, as well as the features and parameters of each of the five effects algorithms are described on the folllowing pages.

The general signal flow through the LXP-15 is illustrated below.

Signal Flow

		Dry Pan	Mix
Input			+	Output
L				L
				Output Level
Front Panel	Effects			Front Panel
Input Knob		Wet Pan		Output Knob
	Algorithm
	Input
	Level
Input			+	Output Level
R		Dry Pan
			Mix

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LXP-15 Owner's Manual	Lexicon

The routing and mixing of input and output signals for all algorithms are controlled by the five parameters found on the “Level” page. As these parameters are common to all LXP-15 algorithms, they are described first. The algorithm-specific parameters will be described with each algorithm.

LEVEL

InLevl	Mix	Wet Pan	Dry Pan	OutLevl
0-100%	0-100%	100%L-51%L,	100%R-51%R,	0-100%
		Center,	Center,
		51%R-100%R	51%R-100%R

Input Level: Adjusts the amount of input signal sent into the effects algorithm. This signal is the sum of the left and right inputs, after the front-panel input control.

Mix: Adjusts the mixture of the dry (left and right inputs) and wet (the left and right algorithm outputs) signals sent to the left and right outputs. When set to 0%, only dry signal is present at the outputs. When set to 100%, only wet signal is present at the outputs.

Dry Pan: A pan control for the dry signal. When a mono input source is used, Dry Pan will “move” the sound between the left and right speakers. When a stereo, or two-channel input source is used, Dry Pan will make one channel louder as the other gets softer.

Wet Pan: A pan control for the wet signal. All effects in the LXP-15 are mono- in/stereo-out. Wet Pan will make one effects channel louder as the other gets softer.

Output Level: Adjusts the amount of dry/wet mix sent to the front panel output control.

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To get some idea of the types of sounds and effects that can be created with the Delay/Reverb algorithm, be sure to listen to and experiment with presets built on this algorithm. (See Chapter 5: The Presets.)

The Delay/Reverb algorithm consists of an equalizer in series with a unique glide delay line and reverb simulator. The glide delay can be smoothly modulated through its entire range with no glitches. While it is being modulated, the glide delay produces pitch shift effects. Increasing delay times will shift the pitch of signals being processed flat; decreasing delay times will shift the pitch sharp. The amount of pitch shift will decrease as the glide delay stabilizes at the new delay time. (There is no pitch shift when the delay has stabilized.) The reverberator is a full-featured room simulator with its own predelay. Its many parameters alllow you to design almost any space you can imagine. One unique feature of this reverberator is infinite reverb: a wash of reverberated sound that sustains forever. (See Decay )

The Algorithms

Delay/Reverb

							Dry Pan	Mix
Input								+	Output
L		Glide Feedback							L
						+			Output Level
EQ	+	Glide Delay	Delay 2	Diffusor	Reverb	Reverb	Wet Pan
		(Modulation)	(Predelay)			Mix
Input						+
Level
									Output
Input								+
R							Dry Pan
								Mix

		DELAY
Glidely	Gldfbk	Delay 2	-	-
0-638ms	0-100%	0-179ms
(64 s steps)		(20 s steps)
		PITCH EQ
-	-	-	HiCut	LoCut
			320Hz-11.6kHz,	Full,
			Full	19Hz-1.35kHz
		REVERB
Decay	Treble	BassMpy	Size	Diffus
.6-6.1s,	320Hz-11.6kHz,	.35x-2.50x	8M-71M	0-100%
Infinite	Full
		LEVEL
InLevl	Mix	Wet Pan	Dry Pan	OutLevl
0-100%	0-100%	100%L-51%L, 100%R-51%R,		0-100%
		Center,	Center,
		51%R-100%R 51%R-100%R
		MODULATION
LFO Rat	Rvb Mix	-	-	-	Parameter pages in
.03Hz-4.84Hz	0-100%
					the Delay/Reverb algorithm

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LXP-15 Owner's Manual	Lexicon

Delay/Reverb parameters Glide Delay:The master predelay for this algorithm, providing up to 683ms of delay. Glide Delay produces pitch shift effects while it is being modulated. Controlling Glide Delay with the LFO can produce vibrato, chorus and flanging effects.

When creating patches, Glide Delay is controlled from two patch page parameters. Gldlyhi provides coarse control over the entire delay range for the parameter (0-683ms). Gldly provides fine control over a smaller range (0- 16.1ms).

Glide Feedback: A positive feedback loop around Glide Delay. When set to maximum (100%), it continues to add input signal into the feedback loop. Use feedback for repeating echo effects and to deepen chorus/flanging effects created by modulating Glide Delay.

Delay 2: Reverb predelay following the glide delay. It can provide as much as179ms of additional delay.For setups that use a mix of both the glide delay and reverberator outputs, use Delay 2 to acoustically separate the two effects.

Like Glide Delay, Delay 2 is controlled from two patch page parameters. Dly2hi provides coarse control over the entire delay range for the parameter (0-179ms). Dly2 provides fine control over a smaller range (5.04ms ).

HiCut: Adjusts high frequency roll-off for the algorithm. Roll-off is adjustable in 16 steps from flat to 320Hz.

LoCut: Adjusts low frequency roll-off for the algorithm. Roll-off is adjustable in 32 steps from flat to 19Hz.

Decay: Adjusts the reverb time for mid-frequency signals. Becase low frequency reverb time (Bass Multipy) is a multplier of decay time, this parameter acts as a master control for reverb time.

In this algorithm, Decay can be set to produce infinite reverb effects. When set to “Infinit,” sounds in the reverb continue to reverberate, but do not decay. (For a truly infinte reverb effect, all of the reverb page settings must be set appropriately. See Patching Examples for an example of this effect.) While decay is set to “Inifnit” input is locked out of the reverberator. This allows you to play over the reverb wash, and prevents cumulative overloading. Experiment with controlling Decay with MIDI Velocity or the input envelope follower for performance control of this effect.

Treble : 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. Maximum setting gives a flat response through the filter section.

Bass Multiply: Sets the reverb time for low-frequency signals, as a multiplier of the Decay parameter. For example, if Bass Multiply is set to 2X and Decay is set for 2 seconds, the low-frequency reverb time will be 4 seconds. For a naturalsounding hall ambience, values of 1.5X or less are recommended.

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