DigiTech RP20 User's Guide

Tube Preamp/Effects Processor & Controller

Please visit Digitech Electronics on the World Wide Web at http://www.digitech.com

User’s Guide

WARNING

FOR YOUR PROTECTION, PLEASE READ THE FOLLOWING:

WATER AND MOISTURE: Appliance should not be used near water (e .g. near a bathtub,

washbowl,kitchen sink, laundry tub,in a wet basement, or near a swimming pool, etc). Care
should be taken so that objects do not fall and liquids are not spilled into the enclosure
through openings.

POWER SOURCES: The appliance should be connected to a power supply only of the
type described in the operating instructions or as marked on the appliance.

GROUNDING ORPOLARIZATION: Precautions should be taken so that the grounding
or polarization means of an appliance is not defeated.

POWER CORD PROTECTION: Power supply cords should be routed so that they are
not likely to be walked on or pinched by items placed upon or against them, paying particular
attention to cords at plugs,convenience receptacles, and the point where they exit from the
appliance.

SERVICING: To reduce the risk of fire or electric shock, the user should not attempt to
service the appliance beyond that described in the operating instructions. All other servicing
should be referred to qualified service personnel.

FOR UNITS EQUIPPED WITH EXTERNALLY ACCESSIBLE FUSE
RECEPTACLE: Replace fuse with same type and rating only.

SAFETY INSTRUCTIONS

NOTICE FOR CUSTOMERS IF YOUR UNIT IS EQUIPPED WITH A
POWER CORD.

WARNING:THIS APPLIANCE MUST BE EARTHED.

The cores in the mains lead are coloured in accordance with the following code:

GREEN and YELLOW - Earth BLUE - Neutral BROWN - Live

As colours of the cores in the mains lead of this appliance may not correspond with
the coloured markings identifying the terminals in your plug,proceed as follows:

• The core which is coloured green and yellow must be connected to the
terminal in the plug marked with the letter E,or with the ear th symbol, or
coloured green,or green and yellow.

• The core which is coloured blue must be connected to the terminal marked N
or coloured black.

• The core which is coloured brown must be connected to the terminal marked
L or coloured red.

This equipment may require the use of a different line cord,attachment plug, or both,
depending on the available power source at installation. If the attachment plug needs
to be changed,refer servicing to qualified service personnel who should refer to the
table below. The green/yellow wire shall be connected directly to the unit's chassis.

WARNING: If the ground is defeated,cer tain fault conditions in the unit or in the
system to which it is connected can result in full line voltage between chassis and
earth ground.Severe injury or death can then result if the chassis and earth ground are
touched simultaneously.

Line

Neutral

Earth Grnd.

CONDUCTOR

L

N

Brown

Blue

Green/Yel.

Black

WIRE COLOR

White

Green

U.K. MAINS PLUG WARNING

A moulded mains plug that has been cut off from the cord is unsafe.Discard the mains
plug at a suitable disposal facility.NEVER UNDER ANY CIRCUMSTANCES

SHOULD YOU INSERT A DAMAGED OR CUT MAINS PLUG INTO A 13
AMP POWER SOCKET. Do not use the mains plug without the fuse cover in place.

Replacement fuse covers can be obtained from your local retailer. Replacement fuses
are 13 amps and MUST be ASTA approved to BS1362.

The symbols shown above are internationally accepted symbols that warn of potential
hazards with electrical products.The lightning flash with arrowpoint in an equilateral
triangle means that there are dangerous voltages present within the unit.The
exclamation point in an equilateral triangle indicates that it is necessary for the user to
refer to the owner’s manual.

These symbols warn that there are no user serviceable parts inside the unit. Do not
open the unit.Do not attempt to service the unit yourself. Refer all servicing to
qualified personnel.Opening the chassis for any reason will void the manufacturer’s
warranty. Do not get the unit wet. If liquid is spilled on the unit, shut it off immediately
and take it to a dealer for service. Disconnect the unit during storms to prevent
damage.

CAUTION

ATTENTION: RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC

SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE

RISK OF ELECTRIC SHOCK

DO NOT OPEN

LITHIUM BATTERY WARNING

CAUTION!

This product may contain a lithium battery.There is danger of explosion if the battery is
incorrectly replaced.Replace only with an Eveready CR 2032 or equivalent.Make sure
the battery is installed with the correct polarity.Discard used batteries according to
manufacturer’s instructions.

ADVARSEL!

Lithiumbatteri - Eksplosjonsfare.Ved utskifting benyttes kun batteri som anbefalt av
apparatfabrikanten. Brukt batteri returneres apparatleverandøren.

ADVARSEL!

Lithiumbatteri - Eksplosionsfare ved fejlagtig håndtering. Udskiftning må kun ske med
batteri av samme fabrikat og type.Levér det brugte batteri tilbage til leverandøren.

VAROITUS!

Paristo voi räjähtää,jos se on virheellisesti asennettu.Vaihda paristo ainoastaan laite­valmistajan suosittelemaan tyyppin.Hävitä käytetty paristo valmistajan ohjeiden
mukaisesti.

VARNING!

Explosionsfara vid felaktigt batteribyte. Använd samma batterityp eller en ekvivalent typ
som rekommenderas av apparattillverkaren. Kassera använt batteri enligt fabrikantens
instruktion.

ELECTROMAGNETIC COMPATIBILITY

This unit conforms to the Product Specifications noted on the Declaration of
Conformity.Operation is subject to the following two conditions:

• this device may not cause harmful interference,and

• this device must accept any interference received, including interference that
may cause undesired operation. Operation of this unit within significant elec­tromagnetic fields should be avoided.

• use only shielded interconnecting cables.

DECLARATION OF CONFORMITY

Manufacturer’s Name: Digitech Electronics
Manufacturer’s Address: 8760 S. Sandy Parkway

Sandy, Utah 84070, USA

declares that the product:

Product Name: RP-20 Valve
Product Options: All

conforms to the following Product Specifications:

Safety: EN 60065 (1993)

IEC 65 (1985) with Amendments 1, 2 & 3

EMC: EN 55013 (1990)

EN 55020 (1991)

Supplementary Information:

The product herewith complies with the requirements of the Low Voltage Directive 73/23/EEC and EMC
Directive 89/336/EEC as amended by Directive 93/68/EEC.

.

Digitech

President of Digitech
8760 S. Sandy Parkway
Sandy, Utah 84070, USA
Tel: [phone]
Fax: [phone]

Effective August 30, 1997

European Contact: Your Local Digitech Sales and Service Office or

International Sales Office
3 Overlook Drive #4
Amherst, New Hampshire 03031, USA
Tel: [phone]
Fax: [phone]

RP-20 Valve

User Guide

I

Quick Start

For those of you who prefer to burn now and read later, we've included this Quick Start section to get you up and running.

Connect Cables:

Connect guitar into the Input jack (located on the rear of the RP-20). Now run from the Output of the RP-20 to the Input of the either the

Guitar Amp, Power Amp or Mixing board.

Apply Power:

Note: When applying power to the RP-20 Valve, it is recommended that the <Input> and <Output> be turned down prior to powering up
the unit.

Adjust Input and Output:

Use the <Input> level knob on the rear panel to adjust the Input level, so that the loudest guitar signal occasionally lights the clip LED
indicator. Now adjust the <Output > level knob on the rear panel of the RP-20 Valve to the desired output level .

Select Preset:

Begin playing your guitar, and choose any preset using the <Data> wheel or pressing any one of the ten footswitches. User Presets 1-100 are
duplicates of the Factory Presets. They are user-programmable. You can modify and store them as you want. Factory Presets 1-100 are not user­programmable and cannot be overwritten.

Data

RP-20 Valve

User Guide

II

Table of Contents

Safety Information

Declaration of Conformity................................................................i

Quick Start........................................................................................ii

Table of Contents ............................................................................iii.

Section 1 - Introduction

Congratulations................................................................................1

Included Items..................................................................................1

Product Features ..............................................................................1

Warranty ..........................................................................................2

A Quick Tour of the RP-20 Valve ................................................3

The Front Panel............................................................................3

The Rear Panel..............................................................................6

Prea mp Section ..........................................................................7

The Digital Effects Section ..........................................................8

Digital Effects ..........................................................................8

Real-Time Modifiers ................................................................8

Module Types ..............................................................................9

Module Sizes ................................................................................9

Section 2 - Setting Up

Making Connections......................................................................10

RP-20 Valve into Extension Speaker Cabinets ............................10

RP-20 Valve direct with the Programmable Speaker Cabinet

Emulator ......................................................................................11

Getting Around the Operating System........................................12

Program Mode..............................................................................12

FX Edit Mode................................................................................12

Utility Mode..................................................................................12

Assign Mode ................................................................................12

Getting Sounds ..............................................................................13

Selecting A Program ......................................................................15

Using the Tuner..............................................................................15

Section 3 - Editing Program

Naming/Storing Programs ............................................................17

Editing a Program..........................................................................19

Editing the Preamp section ........................................................19

Editing the Analog Wah Module..................................................20

Editing the Noise Gate module....................................................21

Selecting FX Configurations ........................................................22

Editing Digital FX ........................................................................22

Changing Effect Modules ............................................................23

Selecting Effect Defaults ..............................................................23

Adjusting FX Module Parameters ................................................23

Custom Defaults ..........................................................................23

Comparing Changes ....................................................................24

RP-20 Valve

User Guide

III

Section 4 - Editing Modules

Storing/Naming Defaults..................................................................25

Editing a Module..............................................................................26

Output Module Functions................................................................27

Effect Module Size and Type List ....................................................28

Effect Default List ............................................................................29

Effect Library................................................................................30

Preamp Section

Analog Wah ..................................................................................30

Distortion Types ..........................................................................30

Noise Gate....................................................................................31

Compressor..................................................................................31

Digital Effects Section

Reverbs ........................................................................................32

Chorus & Flangers........................................................................35

Phasers ........................................................................................39

Rotary Speaker Simulator ............................................................40

Tremolo & Auto Panner ..............................................................41

Pitch Shifters ................................................................................42

Detuners ......................................................................................44

Delays ........................................................................................45

Equalizers ....................................................................................47

Multi Effect Modules ....................................................................48

Whammy Effects ..........................................................................49

Auto Wah......................................................................................51

Section 5 - Advanced Topics

Assigning Modifiers ..........................................................................51

MIDI CC........................................................................................51

LFO ..............................................................................................51

Dynamic........................................................................................51

Internal Expression Pedal ............................................................52

Linking a Parameter to a Modifier ..............................................53

Setting up an LFO and a Dynamic Modifier ................................53

Morphing Pedal Assignments ......................................................54

Volume Pedal Assignment............................................................56

MIDI Functions

MIDI Channels ............................................................................57

MIDI Merging ..............................................................................57

MIDI Receive Map........................................................................57

MIDI Transmit Map......................................................................58

SysEx Device Channels ................................................................58

SysEx Dumps................................................................................58

Preset Dump ................................................................................59

Bulk Dump ..................................................................................60

System Dump ..............................................................................61

Other Utility Functions

Factory Reset ................................................................................61

Global-Local Cabinet Emulator....................................................62

Output Mode................................................................................62

Assigning Functions

Assigning Programs to footswitches ............................................63

Assigning Parameter Control to footswitches or

the Expression pedal....................................................................64

Other Footswitch Functions

Toggle MIDI CC ..........................................................................65

Expression CC Send ....................................................................65

CC Transmit Channel ..................................................................65

Other Pedalboard Tidbits

Bank Up Tuner and Down/ Bypass Footswitches........................66

Using the Tuner ..........................................................................66

Naming Banks ..............................................................................66

RP-20 Valve

User Guide

IV

Section 7 - Appendix

Factory Program List ....................................................................68

Program Descriptions ..................................................................70

Effect Configuration Chart ..........................................................76

Harmony Interval Charts..............................................................77

Specifications................................................................................78

MIDI Implementation Chart ........................................................79

SysEx Implementation Guide ......................................................80

MIDI Basics ..........................................................................80

General Format ....................................................................81

Procedures............................................................................81

Request One Program- 01(h)................................................82

Receive One Program- 42(h) ................................................82

Request Bulk Dump - 49(h) ................................................82

Receive Bulk Dump - 57(h)..................................................82

Request Utility Settings - 11(h) ............................................82

Receive Utility Settings - 12(h) ............................................82

Request Parameter Value - 17(h)..........................................83

Receive Parameter Value - 18(h) ..........................................83

Request All Current Parameter Values - 23(h) ....................83

Receive All Current Parameter Values for current Prg ........84

Request Module Configuration-25(h) ..................................84

Respond Module Configuration-26(h) ................................84

Receive Key Scan Code - 54(h) ............................................85

Receive Key Accepted - 56(h) ..............................................85

Select One Program - 1F(h)..................................................85

Reset Program - 20(h) ..........................................................86

Reset Device - 21(h)..............................................................86

Reset Factory Settings - 22(h) ..............................................86

Request User Defaults - 13(h) ..............................................86

Receive User Defaults - 14(h) ..............................................86

Key Scan Codes ....................................................................87

SysEx Program Dump Example............................................88

FX Modules and Parameter Codes ......................................89

RP-20 Valve

User Guide

V

RP-20 Valve

User Guide

VI

Section-1 Introduction

Congratulations...

... you are now the proud owner of a Digitech RP-20 Valve Guitar Preamp/Processor. The RP-20 Valve is the first-ever Floor processor with a Tube
(12AX7) Preamp section. This allows you to obtain almost any tone imaginable with a full menu of state of the art digital effects right at your feet.

This owner's manual is your key to understanding the powerful world of the RP-20 Valve. Read it carefully. After you've had time to familiarize yourself
with the unit, try experimenting with unusual effect combinations. You are certain to achieve sounds never thought possible before. Good luck, and
thank you for choosing Digitech.

Your RP-20 Valve was carefully assembled and packaged at the factory. Before you proceed any further, make sure the following items are included:

• (1) Owner’s Manual

• (1) Digitech RP-20 Valve Guitar Preamp/Processor

• (1)Power Supply

• (1) Digitech warranty card

Please save all packing materials. They were designed to protect the unit from damage during shipping. In the unlikely event that the unit requires
service, use only the factory supplied carton to return the unit.

RP-20 Valve

User Guide

Section -1 Introduction

1

RP-20 Valve Features:

• Dual distortion path routing

• Built-in Expression Pedal

• Tube Preamp (12AX7)

• Full bandwidth effects (20-20kHz)

• 24-bit signal path, 48-bit internal data path

• Up to 4 digital effects at once

• S-DISC II ® Processing

• Flexible, easy-to-use effect routing

• Effects can be repeated in a chain,
(e.g. EQ + flange + EQ + pitch shift)

• Instant module access

• Exclusive Dynamic Parameter Control

• Programmable Speaker Cabinet Emulator

• Chromatic tuner

• Full MIDI Implementation

• All effects and parameters available for MIDI continuous control

• 2 Expression Pedal insertion jacks to add external CC pedals for
additional assigning options

• Upgradable System Software (via the MIDI In port)

We at Digitech are very proud of our products and back-up each one we sell with the following warranty:

1. The warranty registration card must be mailed within ten days after purchase date to validate this warranty.

2. Digitech warrants this product, when used solely within the U.S., to be free from defects in materials and workmanship under normal
use and service.

3. Digitech liability under this warranty is limited to repairing or replacing defective materials that show evidence of defect, provided the
product is returned to Digitech WITH RETURN AUTHORIZATION, where all parts and labor will be covered up to a period of one year. A
Return Authorization number may be obtained from Digitech by telephone. The company shall not be liable for any consequential
damage as a result of the product's use in any circuit or assembly.

4. Proof-of-purchase is considered to be the burden of the consumer.

5. Digitech reserves the right to make changes in design, or make additions to, or improvements upon this product without incurring any
obligation to install the same on products previously manufactured.

6. The consumer forfeits the benefits of this warranty if the product's main assembly is opened and tampered with by anyone other than a
certified Digitech technician or, if the product is used with AC voltages outside of the range suggested by the
manufacturer.

7. The foregoing is in lieu of all other warranties, expressed or implied, and Digitech neither assumes nor authorizes any person to assume
any obligation or liability in connection with the sale of this product. In no event shall Digitech or its dealers be liable for special or
consequential damages or from any delay in the performance of this warranty due to causes beyond their control.

Digitech™, S-DISCII™, Whammy™, and Silencer II™ are registered trademarks of the Harman Music Group Incorporated.

NOTE: The information contained in this manual is subject to change at any time without notification. Some information contained in this
manual may also be inaccurate due to undocumented changes in the product or operating system since this version of the manual was
completed. The information contained in this version of the owner's manual supersedes all previous versions.

Section -1 Introduction

RP-20 Valve

User Guide

2

A Quick Tour of the RP-20 Valve

The Front Panel

1) Pedalboard- The RP-20 Valves’s pedalboard consists of twelve switches and a real time expression pedal. the footswitches labeled 1-10 can

be used to turn effects on or off, change presets or toggle continuous controller. The <Bypass/(hold) Tuner> footswitch (located on the
bottom row can be used to bypass all of the effects within the RP-20 Valve or activate the tuner mode when held. The <Bank Up/(Hold)
Bank down> footswitch is used to move up and down through any one of the 19 banks in the RP-20 Valve.

2) Display - This large custom display is where you receive most of the information you need to optimize performance of the RP-20 Valve.
This display has several functions and they are as follows:

2a) Program Number - The three large digits located in the upper left corner of the display indicate which Program is currently selected.
This indicator will also display the currently selected note while the RP-20 Valve is in Tuner Mode.

2b) Factory / User indicators - Located directly below the Program number, the Factory and User program icons indicate whether the

Edge of the Earth

100

USER

%kHz
msdB

50

1

CHANGEDLINK

%kHz
msdB

60

2

CHANGEDLINK



%kHz
msdB

%kHz
msdB

70

3

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4

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PAGE10OF

11

WAH

COMP

TUBE EQ

L/R OUTS

CLIP

#

b

GATE

BANK



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2-a

2-c

2-b

2 -g2-f

2-d

2-e

2-h

3

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1

4

5a-f

6

7

Data

RP-20 Valve

User Guide

Section -1 Introduction

3

current program resides in the Factory or User Bank. To toggle between the Factory and User Programs simply press the <Program>
button.

2c) Bank / Page Indicators - Located in the bottom left hand corner of the display, the Bank/Page indicators display:

• The RP-20 Valve Bank number in which the current program resides in Program Mode

• The page which is currently selected in various editing modes.

2d) Information Line - The row of 24 characters in the top line of the display indicates more detailed information about specific

functions and items such as: Program names, Parameter names and Utility information.

2e) Parameter Data Sections - Immediately below the information line, are four parameter data sections. They correspond with buttons

<1> through <4> on the front panel. Each section displays the current value of the indicated parameter.

A LINK icon in each group tells whether the indicated Parameter is linked for expression control. When a parameter has been

modified, the CHANGED icon will appear under the parameter that has been modified and the <Store> button will light to
indicate a change has been made to the program, but not stored.

2f) Input Level / Clip Meters / Tune Indicator- An Input Level and Clip meter is located in the bottom center of the display. This meter

shows the guitar signal level, and uses a peak detector action to display the highest levels at the input. The CLIP icon at the end of the
meter, indicates if the the input signal is being clipped at the Analog input section (pre-digital). The DIGITAL CLIP icon indicates
that there is clipping in the digital effects domain. This meter is also used to show note activity while the RP-20 Valve is in Tuner Mode

2g) Effect Routing Matrix - The Effect Routing Matrix shows the signal flow of the currently selected program through the amp and effect

sections. This matrix includes boxes that represent each effect module along with lines that indicate how those effects are connected to
inputs, outputs and each other. If an effect module is bypassed, a line appears through that module's box in the Matrix.

*When in FX Edit mode, the box that represents the currently selected effect module will flash.

2h) Speaker Cabinet Emulator Icon - When the SPEAKERicon appears in the display, this indicates that the Speaker Cabinet

Simulator is engaged

3)Program and Store - The <Program> button (top) will put the RP-20 Valve in program mode and toggle between the Factory and User
programs when pressed twice. The <Store> button is used to store any editing changes to a program.

4) Parameter Buttons- The parameter buttons <1> through <4> are used to select the parameter to be modified or the utility item that you
wish to edit.

5a-f) Editing Buttons- These 6 buttons are used in the editing functions of the RP-20 Valve and their functions are as follows:

5a) Preamp - Pressing the <Preamp> button will enter the Preamp section of the RP-20 Valve. Successive presses will move through the

individual modules of the preamp section including: Wah, Tube Distortion, Solid State Distortion, EQ and Noise gate.

5b) Effects - Pressing the <Effect> button will take you to the digital effects section. Successive presses of the effects button will move

through the individual effect modules one at a time.

Section 1 Introduction

RP-20 Valve

User Guide

4

5c) Utility - Pressing the <Utility> button will enter the utility mode where editing can be done.

5d) Previous Page - The <Previous Page> button moves to the previous page of the selected module that is being edited or to the

previous utility page when the RP-20 Valve is in Utility mode.

5e) Next Page - The <Next Page> button moves to the next page of the selected module that is being edited or to the next utility page
when the RP-20 Valve is in Utility mode.

5f) Assign - The <Assign> button is used for making any continuous controller assignments to footswitches. For more information about
assigning functions, please see page 63.

6) Data Wheel - The <Data> Wheel is used for scrolling through the programs of the RP-20 Valve and various editing functions

7) Expression Pedal - The Expression pedal is used for continuous control over any parameter of the RP-20 Valve. For more about

continuous control assignments of the RP-20 Valve, please see page 63.

RP-20 Valve

User Guide

Section -1 Introduction

5

The Rear Panel

1) Input - This is the audio input jack for the RP-20 Valve.

2) Input Level - This is the input control knob for the RP-20 Valve. To achieve the optimal setting for the RP-20 Valve, turn the input knob up

until the signal clip LED (3) occasionally lights when an input signal is fed into the RP-20 Valve.

3) Input Signal Clip LED - This is the Input signal clip LED of the RP-20 Valve. When this LED lights, the input signal is too strong and should

be turned down until this LED only occasionally lights.

4) Output Level - This is the Output level control knob, and is used for setting the overall output level of the RP-20 Valve.

5) Right Output - This is the right output jack of the RP20 Valve.

6 Left (Mono) Output - This is the left (Mono) audio output of the RP20 Valve. This output jack can be used as the Mono out or can be used

with the right output to produce stereo outputs.

7) Headphone Out - This is the stereo headphone output. The headphone output level is controlled by the output level control knob

8) MIDI In - The MIDI IN port allows the RP-20 Valve to respond to incoming MIDI information.

9) MIDI Out/Thru - This port allows the RP-20 Valve to send out or pass MIDI data to other devices.

10) AC Line Input - This input is used for the input of the included power supply.

Note- Use only the included PS940 power supply.

1

3

24567 8 910

Section -1 Introduction

RP-20 Valve

User Guide

6

The Preamp Section

Dual Distortion Paths: A truly unique feature that the RP-20 Valves offers, is the ability to run dual distortion paths within the same effect

configuration. What does this mean? This means that you can run your guitar’s signal through two distortion paths at the same time and
morph between them. This is a great effect for producing clean and distorted tones at the same time.

Solid State Distortion Path: The Solid State distortion path in the RP-20 Valve gives you the ability to get great clean tones, classic rock fuzz
distortions, and even high gain rock distortions.

Tube Distortion Path: The Solid State distortions are great to use alone, but the RP-20 Valve is the first to provide the user with Tube
preamp tones in a floor mounted effects processor. This will give you the ability to re-create classic tube distortions which are ideal for playing
country rock, blues and all out rock guitar.

Digitally Controlled Analog Wah: Conveniently located in the preamp section, lies a digitally controlled Analog Wah module. The Analog
Wah will produce classic wahs, modern wahs, and even auto wahs. The Analog wah is assignable to the built-in expression pedal on the RP-20
Valve. For more information on using the Analog Wah with the expression pedal, please see pages 20.

Preamp Compressor: The RP-20 Valve provides you with a compressor in the preamp section to dial-in all of your preamp tones. The
compressor can be used to tighten-up the clean rhythm tones or make a solo come to life.

Dual 10 band EQs: If having dual distortion paths within RP-20 Valve is not appealing enough, you also have 10-band EQ modules in each
path. This will give complete tonal control over each distortion type that is being used.

Silencer II™ Noise gate To keep the RP-20 Valve ultra-quiet, we have included the world famous Silencer II™ noise reduction system under
the hood. This make the RP-20 Valve an ideal piece for any studio recording.

RP-20 Valve

User Guide

Section -1 Introduction

7

Digital Effects

Not only does the RP-20 Valve provide you great preamp tones, but it also has a world class digital multi-effect section that includes almost
every studio-quality effect imaginable.

Effects include:

• Reverbs (Natural & Spring) • Auto panners

• Choruses • Analog/Digital Delays

• Tremolos • Whammy Effects

• Rotary Speaker Simulation • Chromatic Pitch Shifters

• Phasers • Intelligent Pitch Shifter

• Flangers • Detuners

• Digital Compressor

Real Time Parameter Modifiers: Modifiers are unique tools that can be used to dramatically alter your sound based on information

from signal amplitude, the settings of a Low Frequency Oscillator (LFO) or MIDI Continuous Controller information.

Every Program in the RP-20 Valve has a set of modifiers. Up to 16 Modifier links can be assigned to control parameters. There are 5 types of
Modifiers that can be linked to a parameter: Foot Switch, Expression Pedal, MIDI CCs, LFOs, and Dynamic (signal level dependent).

MIDI CCs: When you use MIDI CCs, your RP-20 Valve responds to CC numbers 0-127 and CHP (channel pressure or aftertouch).
For example, you can have a synth's modulation wheel (usually MIDI CC#1) control the Input level of a reverb and chorus in one Program,
while the delay feedback may be controlled in another. For more information on MIDI CCs, please see pg. 51.

LFOs: When you use LFOs, parameter values can be controlled automatically between a defined minimum and maximum setting at a user­definable rate. Your RP-20 Valve has 2 user definable LFOs in each program that can use unique speeds and waveforms, and can be assigned to
any Parameter.
For example, you can create an auto panner without using an auto panner module. Simply link an effect's output pan parameter to the LFO
modifier and the LFO will move that parameter back and forth. This modifier can be a very useful weapon in the ongoing battle of new sound
creation. For more information on LFOs, please see pg. 51.

Dynamic Modifiers: When you use Dynamic Modifiers, the parameter values are controlled in relation to the dynamics of the input signal.
The possibilities are nearly endless. For more information on Dynamic Modifiers, please see pg. 51.

For example, you could link the Dynamic Modifier of a Program to control a chorus level. It doesn't sound like much on paper, but imagine the
expressiveness of this type of effect on a lead. As you play the guitar harder, the chorus becomes less apparent. Play softly and the chorus
increases. ALL IN REAL TIME!

For more information on using modifiers see the “Assigning Modifiers” section on page 51.

Section -1 Introduction

RP-20 Valve

User Guide

8

Module Types

Each effect in the digital FX section is contained in separate effect blocks referred to as “Modules”. There are three basic types of FX Modules
used by the Digital FX section of the RP-20 Valve

• Mono FX module

• Dual FX module

• Stereo FX module

The figure below illustrates how signals are routed through each type of FX Module. Although all three Modules are shown with stereo
inputs, they can still be used with a mono source. The mono source would just be routed to both sides of the module’s inputs. Notice how
the Dual FX Module maintains a stereo image, while the mono FX Module always sums the signal

Module Sizes

These modules vary in size ranging from 1/4 size to Full. In order to achieve the nearly endless combinations of effects and routings, we've
supplied you with four different module sizes and they are as follows:

• Full (module type = FUL)

• 3/4 (module type = 3-4)

• Half (module type = HLF)

• Quarter (module type = 4th)

Dividing the S-DISC II’s processing power allows your RP-20 Valve to produce up to 4 digital effects at one time. The figure below represents
how the S-DISC II can be divided to accommodate a wide variety of effect routing.

A Full module type offers effects with more flexibility and power than the Half modules, and so on, but all four sizes of FX Modules feature
high quality effects, so you don’t have to worry if you need to divide the S-DISC II pie four ways. For a complete list of these FX Types please
see the Editing Modules section. For a complete list of effect configurations please see Appendix on page 76.

S-DISC II

FULL

3/4

HALF

QUARTER

Mono FX Module

Effect

Processing

Dual FX Module

Effect

Processing

Effect

Processing

Stereo FX Module

L

R

L

R

L

R

RP-20 Valve

User Guide

Section - 1 Introduction

9

Section-2 Setting Up

Making Connections

Your RP-20 Valve can be connected in several different ways to meet the requirements of specific applications. The following diagrams offer

some different ways your RP-20 Valve can be connected.

RP-20 Valve into a stereo power amp and two 2x12 Extension Speaker Cabinets

For those of you out there that feel that “bigger is better”, this set-up should work quite nicely for you. First plug into the input of the RP-20
Valve. RP-20 Valve run out of both of the outputs into the stereo inputs of the power amp. Using a set-up such as this will let you produce that
classic Stack Sound. This is also a great set-up to produce lush and thick stereo effects.

Input

Right Out

Right In

Left (Mono) Out

Left (Mono) In

Preset/Data

Stereo 100 Power Amp

Section - 2 Setting Up

RP-20 Valve

User Guide

10

Running Direct with the Programmable Cabinet Emulator

The RP-20 Valve provides you with a speaker cabinet emulator for running direct to a mixing board.

When using the speaker cabinet emulator, it can be done by simply engaging cabinet Emulator in Page 2 of the Utilities menu. To get there,
press the <Utilities> button. Now press the <Next Page> or <Previous Page>buttons and move to page 2. Once there, you can globally
enable (global on) or disable (global off) the Emulator or enable local settings (local on) by pressing the <4> button and then turning the

<Data> wheel. To set up local (Programs dependent) emulation on page 2 of the Output/Master mix module in edit mode press the
<Effects> button until you reach the last page in the effect configuration chain where the master mix is located. Now press the <Next Page>

button to move to page 2 of the parameters. use the <1> , <2> and <3> buttons to set the cabinet emulator parameters.

To Exit this mode, simply press the <Program> button.

At this point, you will want to run from either Left or Right outputs (or both for a stereo mix), into the selected inputs of the Mixer. You can
set the Output mode to either Stereo (splitting the signal into a stereo soundfield) or Mono (summing the stereo signal) on page 1 of the
Utilities menu by using the <2> button to select the mode.

As usual, it is a good idea to check all of the cables being used when making connections to ensure that good contact is being made.
Notice that once the Speaker Cabinet Emulator is turned On, the SPEAKER icon will appear in the display.

Pan

Mute

-10

0

+5

+10

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-5

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Mute
L / R

Mute
L / R

Mute
L / R

-5

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+2

+3
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-5

-4

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-5

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+2

+3
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-5

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+2

+3
+4

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Pan

-5

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+2

+3
+4

+5

Pan

-5

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-3

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+2

+3
+4

+5

Pan

-5

-4

-3

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+2
+3
+4

+5

Pan

-5

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+2

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+5

1234

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0

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5

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-5

Mute
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6

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Input

Preset/Data

RP-20 Valve

User Guide

Section - 2 Setting Up

11

Getting Around In the Operating System

The menu structure of your RP-20 Valve has been specially designed to be easy to use. The display shows the information you need, but to
make things even easier for you, illumination of the front panel buttons offers additional operating information.

The front panel buttons give you information in one of two ways:

1 - If the button is dim, its function is inactive. Pressing a dim button causes it to light brightly and its function becomes the active item in

the display. If the dim button doesn’t light after you press it, the button is unavailable.

2 - If the button is bright, its function is active.

Program Mode

Program mode allows you to scroll through the Factory and User programs using the <Data> wheel. When your RP-20 Valve is turned on, it
sets itself to Program mode. Program mode is active when the <Program> button is lit and a Program name is present on the information
line (top line) of the display.

FX Edit Mode

This mode allows you to edit:

1. Digitally controlled Analog Wah

2. Compressor

3. Distortion Types

4. Noise Gate

5. Selecting Effect Configurations

6. FX Modules

7. Output Mode of your Programs

Use either the <Preamp> or <Effects> buttons to enter the FX Edit mode.

A helpful hint: If you look at the Effect Routing Matrix while you press the FX <Preamp> or <Effects> button, the currently selected
module will flash.

Your RP-20 Valve uses “Pages” to navigate within an effect. A “Page” is a group of up to four effect parameters that appear on the screen at one
time. Use the <Next Page > or <Previous Page> buttons to move through the pages in the menu. Note that as you scroll through the
pages, the page indicator in the lower left corner of the display changes to show the currently displayed page number.

Utility Mode

From the initial power-up of the unit, access to all of the menu pages of the utility mode can be made by simply pressing the <Utility>
button located on the front panel of the unit. From this point, the display will tell you that you are in the Utility mode and you can scroll
through the options by turning the <Next Page > or <Previous Page> pages buttons.

Assign Mode

Once the RP-20 Valve is in assign mode, all modifier assignments can be made. This assign mode gives you the ability to assign dynamic
modifiers, foot switches and the expression pedal to almost any parameter in the RP-20 Valve. Access to this function is located on the front
panel <Assign> button or in the utilities pages within the RP-20 Valve. For more information on assignments, please see page 51.

Section - 2 Setting Up

RP-20 Valve

User Guide

12

Getting Sounds

It never fails, there always seems to be a sound man at the back of the room, or an engineer in the control room that wants “more of this, or
less of that” (bottom line: your ear is king). But, to accommodate these situations, you may need to make some minor adjusting here and
there along the way. So here are some helpful guidelines for getting great sounds, while keeping everyone happy.

Input and Output Adjustments

The best setting for the input control is to use the <Input level> knob so you’re occasionally lighting the clip LED. As far as setting the
<Output level> knob, let your ears be the judge. But, if you can’t hear the rest of the band, chances are that you need to back off on the

output level of the RP-20 Valve.

Preamp Effects

Preamp Section Adjustments

When editing in the preamp section, you have the option of editing the following preamp effects:

1. Solid State Distortion

2. Tube Distortion

3. Analog Wah

4. Compressor

5. 10-band EQ

6. Noise Gate

To dial in the preamp tone that is ideal for you, whether it be Distortion types, Analog Wah, 10-band EQ or noise gate adjustments, simply
press the <Preamp> button, which will put you in preamp edit mode. From there continue to press the <Preamp> button until you
reach the preamp module which you wish to edit. Notice that the module for editing will Flash in the display. Now that you are at the
module that you wish to edit, you can begin to use the <Next Page> and <Previous Page> buttons to move you through the module.
Once you arrive at a page you wish to edit, the display will show up to 4 parameters per page. To edit one of the parameters, simply press
one of the four function buttons marked <1-4> to select the parameter. At this point you can scroll through that selected parameter by
using the <Data> wheel. Once you have your sounds, always make sure to store and press the <Program> button to exit the edit mode.

The illustration below shows all of the editing tools needed for Preamp section editing.

Data

RP-20 Valve

User Guide

Section - 2 Setting Up

13

Digital Effects

Digital Effect Section Adjustments

When editing in the digital effect section, you have the option of editing the following:

1. Digital Effects

2. Wet/Dry Mix

3. Effect Configuration

4. Effect Module Size

When you are editing the digital effect section of the RP-20 Valve, whether it be effect type, Wet/Dry Mix, Effect configuration or module size,
simply press the <Effects> button, which will put you in digital effect edit mode. From there continue to press the <Effect> button until
you reach the digital effect module that you wish to edit. Notice that the module for editing will Flash in the display. Once you are at the
module that you wish to edit, you can begin to use the <Next Page> and <Previous> page buttons to move you through the module.
Once you arrive at a page you wish to edit, the display will show up to 4 parameters per page. To edit one of the parameters, simply press
one of the four function buttons marked <1-4> to select the parameter. At this point you can scroll through that selected parameter by
turning the <Program/Effect> wheel. Once you have your sounds always make sure to store and press the <Program> button to exit the
edit mode.

The illustration below shows all of the editing tools needed for Digital Effect editing.

Data

Section - 2 Setting Up

RP-20 Valve

User Guide

14

Selecting A Program

When you first turn on your RP-20 Valve, you are in Program Mode, and the display will appear something like:

To select a program, do the following:

1. Make sure program mode is selected (the <Program> button will be brightly lit). If the <Program> button is dim, press it once to

return to program mode.

2. Use the <Program> button to select the program bank (factory or user). successive presses of the <Program> button toggle between

the factory and user bank of programs.

3. Using the <Data> wheel, scroll to the Program you want to use, or press one of the footswitches.

Using the Tuner

The Tuner of the RP-20 Valve can be accessed pressing and holding the < Bank Down/Tuner> footswitch.

Instant Tuner Access

To instantly access the Tuner Mode of the RP-20 Valve, press and hold the <Bypass/Tuner> footswitch. This will take you directly to the
tuner function.

1. As you play a note on the guitar, the large number display will tell you which note you are playing, while the meter will show you if you are
flat or sharp. If the meter is moving right, the note you are playing is sharp. If the meter moves left, you are flat. The goal is to tune your
guitar so that the meter stops moving, and the display will lock-in, indicating that you are in tune. Once you start playing the selected note,
the display will read as follows:

A Tuner A=440 Output

127

FACTORY USER

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User Guide

Section - 2 Setting Up

15

Press the any button to exit the Tuner mode.

Reference and Output

The RP-20 Valve gives you the option of changing the Tuning reference from as low as F# or A=427 to A=453, by simply pressing the <3>
button and then turning the <Data> wheel while the RP-20 Valve is in Tuner mode. Another feature available in the RP-20 Valve Tuner mode,
is the ability to set the amount of signal that is passed to the output while tuning. This has a range from 0 (mute) to 100%. The output can be
changed by pressing the <4> button and then turning the <Data>wheel to the desired level while the RP-20 Valve is in Tuner mode.

Section - 2 Setting Up

RP-20 Valve

User Guide

16

Section-3 Editing Programs

Naming and Storing Programs

Before we get into editing programs and creating your own sounds, let’s learn how to store changes so you won’t lose any modifications you’ll
want to keep. The Store procedure allows you to rename, relocate and save any modifications you have made to programs so that they can be
accessed easily later.

Naming the Program

1. Press the <Store> button once. The display shows the current program name (which may look something like this):

A cursor appears under the first character of the program name.

2. Using the <Data> wheel, change the character to the one you want in the selected position.

3. When the correct character is displayed in that position, press the <1> button and then turn then <Data> wheel to scroll the cursor to

the next character you want to change.

4. Use the <1> button and the <Data> wheel to change the letter’s case. The <2> button and <Data> wheel are used to select

numbers, The <3> button and <Data> wheel are used to insert spaces. The <4> button and <Data> wheel are used to copy and
paste characters.

5. To copy a character, position the cursor under the character you want to copy (using the <Next Page > and <Previous Page>

buttons), then press the <4> button and ten turn the <Data> wheel clockwise. To paste the copied character, position the cursor
where you want to paste the character, then press the <4> knob and then turn the <Data> wheel counter-clockwise.

6. To abort the procedure, press any button other than <Store>.

Name: Big Thick Clean

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User Guide

Section - 3 Editing Programs

17

Storing the Program

1. When you have the name how you want it, press the <Store> button again. The top line of the display appears something like this:

This screen allows you to select the location of the new Program. Note that when the Program is stored, it is stored in the User bank of
programs because factory programs cannot be overwritten.

2. Press the <2> button and then turn the <Data> wheel to select the program number where you want to store the new program.

3. Press the <Store> button again. The top line of the display briefly reads:

after which you are taken to the program you have just stored.

The newly created program is now loaded, and can now be recalled at any time.

4. To abort the procedure, push the <Program> button to return you to program mode.

Storing Program

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Section - 3 Editing Programs

RP-20 Valve

User Guide

18

Editing a Program

The RP-20 Valve is capable of producing almost any guitar sound ever thought conceivable. Whether it be Preamp tone or an effect configura­tion that utilizes the most sophisticated digital effects available. Great sounds aren’t just a crazy concept, but a very achievable possibility, and
in these next few pages, we will give you some pointers in editing programs, to help achieve your own unique tones.

Program Editing Sections

1. Preamp Section Editing

2. Digitally controlled Analog Wah Editing

3. Preamp Compressor

4. Noise Reduction Editing

5. Digital Effects Editing

Preamp Section Editing

From any program within the Preamp Section you can select and edit any preamp effect by performing the following procedures:

Editing Distortion Types

1. From program mode press the <Preamp> button once and the display will appear something like this:

2. Now continue to press the <Preamp > button until only the selected distortion type (Tube or Solid State) flashes in the display. Once

you are there, the display will appear something like this:

Tube Distort Dirty 1

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User Guide

Section - 3 Editing Programs

19

3. Pressing the <1> button and then turning the <Data> wheel will turn the distortion type on and the <4> button and <Data> wheel

will select the default types of the distortion.

4. Once the distortion type has been selected, use the <Next Page> or <Previous Page> buttons to move to page 2 of the distortion type
menu. Page 2 lets you select and adjust distortion type and gain amount by pressing the <2> button then turning the <Data> wheel
you can select the distortion type. Pressing the <4> button and then turning the <Data> wheel you can adjust the gain.

5. Once the adjustments are made to the type and gain of the distortion type, make sure to store any changes

Analog Wah Editing

Analog Wah editing can be done by performing the following procedures:

1. From Program mode press the <Preamp > button until the Wah module is flashing. The display will appear something like this:

2. Pressing the <1> knob and then turning the <Data> wheel will either turn the Wah On or Off. The <2> button is used to activate the
Wah pedal range and the <4> button and <Data> wheel is used to select the Wah type.

3. The <2> (pedal parameter) can be assigned to the internal expression pedal. This is parameter can be selected by pressing the <2>
button and then turning the <Data> and a

Changed

icon will appear directly beneath the parameter. At this point press the

<Assign> button and the display will appear as follows:

Wah Pedal Toe Heavy

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Section - 2 Setting Up

RP-20 Valve

User Guide

20

4. Now press the Expression Pedal. If the Expression Pedal is already assigned to control another parameter, the display of the RP-20 Valve

will ask you if you want to re-assign. If you wish to re-assign press the <1> knob and turn the <Data> wheel for yes or the <2> knob
to abort the assign function.

Note: Any time an assignment to turn a parameter On/Off is made you must decide if you want the parameter On when you enter the

selected program. If you want it on, make the assignment to the parameter when the parameter is set to On. Otherwise, have the
parameter set to Off or Bypass and the parameter will not be active within the program until the footswitch is used to activate the
parameter

5. To Exit the Analog Wah edit mode, simply press the <Program> button.

Noise Gate Editing

The procedure for editing the Noise Gate module within the preamp section is as follows:

1. From program mode, press the <Preamp> button until the Noise Gate module is selected and is flashing and the display appears

something like this:

2. At this point, you can press the <1> button and then turn the <Data> wheel to turn the Noise gate On or Off and the <4> button and
the <Data> wheel are used to select the Noise gate default.

4. Now use the <Next Page> button and move to page 2 of the Noise gate edit module. This page is used to set the Threshold,
Attenuation, Attack and Release parameters. Higher Threshold settings will close the gate sooner. Lower Release settings allow the gate
to open up faster. To adjust any of these parameters, use the numbered buttons <1-4> and then turn the <Data> wheel.

5. To exit Noise gate edit mode, press the <Program> button.

Noise Gate LoThresh

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Section - 3 Editing Programs

21

Selecting Effect Configuration Routes

Within every Program of the RP-20 Valve, you have the option of selecting any 1 of the 15 Effect Configuration routes available in the RP-20
Valve. This can be very helpful when you have a program that uses a preamp tone that you prefer, but the currently selected effect configura­tion is not ideal for the digital effects that you wish to use in the Program. You can easily change these Effect configurations by using the
following procedure as a guide:

1. Accessing the effect configurations can be done by pressing the <Effects> button until the display appears like this:

Note that the effect configuration is flashing

2. Now press the <1> button and then turn the <Data> wheel to select any one of the 15 different configurations available.

3. Once the configuration has been selected, press the <Store> button to save any changes.

4. To Exit the configuration menu, just press the <Program> button to return to program mode.

A Complete listing of the effect configurations of the RP-20 Valve can be found on page 76.

FX Edit Mode

1. From Program mode, press the <Effects> button. The display looks something like this:

2. Successive presses of the <Effects> button will move you through the chain of effects modules.

When you enter FX Edit mode, the first page of every FX Module allows you to:

1) Bypass that effect module (by turning it on or off) by pressing the <1> button and then turning the <Data> wheel.

2) Select an Effect Module (Only in the Digital Effect section), by pressing the <2> button and then turning the <Data> wheel.

3) Store the Default by pressing the <3> button and then pressing the <Store> button (for more info on storing Defaults, see pg. 25.

4) Select a Default for the selected Effect Module by pressing the <4> button and then turning the <Data> wheel.

Config: Series 3,4

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Section - 3 Editing Programs

RP-20 Valve

User Guide

22