DigiTech RP21D manual Effect Types, Choruses and Flangers

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RP21D User’s Guide Section Two - Editing Functions

Effect Types

Pressing the Effects button will advance you to the next module in the Digital Effect chain. The procedure for editing each module will be the same as the procedure previously described with the chorus. The only exception being that different effects will have different parameters, and some may have a different number of pages. The following is a list of the types of effects available with the RP21D, and a definition of the parameters.

Choruses and Flangers

Both choruses and flangers use a Low Frequency Oscillator (LFO) to produce their rich, swirling effects. When you change the speed and depth Parameters of modulation effects, you're actually controlling the frequency and amplitude of the LFO. These settings determine the rate and intensity of the modulation effect.

In general, here's how a chorus works: after entering the Module, the source signal is split into two paths. One is allowed to pass through the Module unaltered, while the other is delayed and pitch modulated with an LFO. The modified sound is then sent to the output, along with the original. In the following figure, a sine wave is used to modulate the pitch of the split sound source. The Dual Chorus creates two different pitch “voices”, while the Octal Chorus creates eight voices for extremely full, rich sounds.

P I T C H

10 -5 cents 0 5 cents 10

1 sec

2 sec

3 sec

T I M

E

 

Modulated Sound

 

Original Sound

 

The only difference between choruses and flangers is that flangers use less delay and have a feedback Parameter that sends a portion of the effected signal back to the input of the selected module. When the effected signal reaches the input, it is sent through the Module again, building thickness and depth. If you increase the feedback enough, the source begins to lose its own original pitch to the dramatic pitch modulation of the feedback loop.

LFO Waveforms: There are four LFO waveforms available for Choruses, Flangers, Phasers, Tremolos, Auto Panners. They include SINe, TRIangle, SPecial-1, SPecial-2, and SPecial-3. The following examples show what these waveforms look like.

(DEPTH)AMPLITUDE FREQUENCY (SPEED)

SINE LFO

AMPLITUDE (DEPTH)

FREQUENCY (SPEED)

AMPLITUDE (DEPTH)

 

 

TRIANGLE LFO

FREQUENCY (SPEED)

SP1 LFO

(DEPTH)AMPLITUDE FREQUENCY (SPEED)

SP2 LFO

(DEPTH)AMPLITUDE FREQUENCY (SPEED)

SP3 LFO

(Modifiers only)

Chorus

Chorus is probably the most basic modulation effect. It is really just a very small delay whose time is always changing. As the time is varied, the delayed signal's pitch changes (just like a tape recordings pitch raises when you play it faster). By moving the time back and forth, you hear a sound that goes in and out of tune. When combined with the original sound, it almost sounds like more than one instrument is playing. The RP21D uses several choruses at once to make huge rich sounds. For example, the octal chorus uses eight chorus voices at once

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Contents Page Mains Plug Warning Digitech Electronics RP21, RP21DDigitech III Table of Contents Introduction RP21D FeaturesQuick Start Apply PowerMaking Connections Select ProgramFront Panel Guided Tour of the RP21DRear Panel Making Connections Getting StartedStereo Program Mode Powering the RP21DAbout the RP21D DisplayPrograms FootswitchesExpression Pedal EffectsPreamp/Analog Modules Digital Effects ModulesEdge of the Earth Selecting a Program Preamp DefaultsCreating Programs Editing the PreampCompressor CompressorHeavy ThreshRatio AttackMediumCompressor LevelTube Distortion Wah WahWah Pedal Toe Heavy Tube DistortType Dirty Tube Gain Saving a Distortion DefaultDistort Solid State DistortionLow Fuzz Type FuzzBand Graphic Equalizer Level PhaseTube GEQ PunchNoise Gate 80Hz 140Hz 250Hz 450HzTube GEQ Custom TypeSilencer2 Noise Gate LoThreshPost T&D ThreshAtten AttackRelseMaster Preamp Settings Noise Gate CustomDISTPan Mix DistByp Lvl DSPLvl Mstr TubeOn Lvl DSPLvl MstrNaming a Default Storing a User Preamp DefaultPreAmp Custom NameUserDefault List RP21D User’s Guide Section Two Editing Functions Digital Effects ConfigurationFXThru Module Changing EffectsCenter FX Dual ChoSpeed Depth WvFrm FXLvl DryLvl BalanceOutA PanA OutB PanB DlyA DlyB BalanceEffect Types Choruses and FlangersChorus Chorus Parameters Flanger Parameters FlangerPhaser Parameters PhasersPedal Phaser Pedal Phaser ParametersTremolo and Auto-Panner Rotary Speaker SimulatorFeedback Rotary Speaker Simulator ParametersTremolo DelaysAuto Panner Tremolo & Auto Panner ParametersDelay Parameters FX Lvl Dry Lvl Balance Dly Time FdBck TapIt SmearFrequency Gain Dly a B Dly C D Out Multi-Effect Module Parameters Multi Effects Modules Chorus/Delay and Flange/DelayReverse Delay Time WarpSampler Reverbs Gated Reverb ReverbReverb Parameters TypeDiffusion DispersionOver Type Over FreqDelay D Delay CDetuners Increasing, Shelf, and Reverse ShelfDtn a B Pitch Shifters and HarmonyDtn C D Dtn E -HPitch Shifters Parameters Whammy Effects Auto WahWhammy Effect Parameters Equalizers Auto Wah Effect ParametersGraphic Equalizers Here are a couple of simple examplesParametric Equalizer Parameters Parametric EqualizersCabinet Emulator Master MixMaster Mix Dry Wet CabEmType Pre DigitalStoring/Copying Programs NameStyx And StonesStore Prg toStyx And Sto Foot Controller Functions Select Contrl F.SwitchAssigning Programs Assigning On/Off FunctionsExpression Pedal Assignments Re-assign F.switch ?Assigning the Morph or Volume Assigning the WahSeries Dynamic Filters ModifiersLow Frequency Oscillators Midi Continuous ControllersFXLvl CC # Min Max Viewing, Changing, or Deleting AssignmentsTuner Cabinet Emulation Output ModeMidi Channels OutputMonoProgram Transmit Map Program Receive MapMidi RcvChnl TransChnl Prg Rcv MapMIDI= UserSysEx Channel and Midi Merge SysEx DumpSysEx Channel Midi Merge Program Dumps User Default DumpSysExDump Bulk System SysExDump UserPrg³PrgNumAssigning a Midi CC to the Expression Pedal Assigning a Midi CC to PedalsUsrDfltPreamp User PdlsBanks FS=Prg CCTranFactory Reset Volume Pedal UpdateFactory Reset? Bank NamesAre you sure ? Recalibrating the Expression PedalRecalibrate Pedal ? Push pdl forward,pressRP21D Factory Program List Section Five AppendixInput Section SpecificationsRecognized Remarks

RP21D specifications

The DigiTech RP21D is a versatile multi-effects processor designed for guitarists seeking to expand their sound palette. With its comprehensive range of features and user-friendly interface, this device stands out as a reliable tool for both live performances and studio recordings.

At the core of the RP21D lies its extensive library of effects. Guitarists can choose from an impressive selection of up to 54 different effects, including distortion, overdrive, delay, chorus, reverb, and more. This variety allows musicians to create a unique sound that fits their style, whether they are seeking a classic rock tone or a more contemporary sound.

One of the standout features of the RP21D is its ability to store presets. With 40 user-defined patches and 40 factory presets, players can quickly recall their favorite sounds during a performance. This feature is particularly useful for guitarists who switch genres or styles frequently, as it allows for rapid transitions without the need for complex setups.

The device is equipped with a dual-analog distortion circuit, which provides a warm, tube-like tone that enhances the overall sound quality. Additionally, the RP21D includes a 24-bit A/D and D/A converter, ensuring high-resolution audio processing. This results in a cleaner and more dynamic sound, making it suitable for professional use.

The RP21D features a simple and intuitive interface, highlighted by a large LCD display that provides clear information about selected effects and parameters. Navigation is made easy with dedicated buttons for quickly adjusting settings and switching between effects.

Connectivity options are plentiful, including standard 1/4-inch inputs and outputs, as well as a built-in headphone jack for silent practice. The device also includes a direct output for connecting to a PA or recording system, making it an excellent choice for live situations and studio work alike.

In terms of power, the RP21D can be powered by either batteries or an AC adapter, offering flexibility for musicians on the go.

Overall, the DigiTech RP21D is an impressive multi-effects pedal that combines quality sound processing with a vast range of features. Whether you are a seasoned guitarist or a beginner, the RP21D offers everything needed to explore new sonic territories and refine your musical expression. Its robust construction and reliable performance make it a valuable addition to any guitarist’s rig.
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