Doepfer A-100(~ 40 MB) Manuel d'utilisateur

SYSTEM A - 100Owner’s Manualas of May 2014doepfer Musikelektronik Gmbh

2. Overall design System A - 100doepfer4Note: Older A-100 cases manufactured before 2000may include a former power supply (A-100NT12) thathas only 6

X-treme Filter A-106-1 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER83. OverviewFig. 4: front panelControls:1Frequ. : manual frequency control2 CV2: atten

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 X-treme Filter A-106-194. Controls and In- / Outputs! CV1: CV1 input1 Frequ. : manual frequency control"

X-treme Filter A-106-1 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER106 CL+: positive clipping control7CL–: negative clipping controlThis controls are use

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 X-treme Filter A-106-1115. User ExamplesVoltage Controlled Morphing between LP and HPA voltage controlled pa

X-treme Filter A-106-1 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER12

doepferSystem A - 100Multitype Morphing Filter A-10711. IntroductionModule A-107 is a completely new voltage controlledfilter that has available

A-107 Multitype Morphing Filter System A - 100doepfer2Fig.1: A-107 Overall view0312 08S01 S02 S31 S32Control UnitCV 1ManClk Res CV1ManValueFilt

doepferSystem A - 100Multitype Morphing Filter A-10732. Basic principlesModule A-107 consists of the 100% analog filter unitwith the parameters f

A-107 Multitype Morphing Filter System A - 100doepfer43. Overview➅➇➈➎➀➆➉➋➌➍➊

doepferSystem A - 100Multitype Morphing Filter A-1075Programming Unit Controls:1 Display: 3 digit LED display2 Step: button, calls up display mo

doepferSystem A - 100 2. Overall design5Fig. 2: Connecting the ribbon cable to the moduleD Now join the free end of the ribbon cable (see 2 inFig. 3

A-107 Multitype Morphing Filter System A - 100doepfer64. Programming Unit Controls1 DisplayThis is a 3-digit LED display with three decimal poi

doepferSystem A - 100Multitype Morphing Filter A-10773 FilterOperating this button calls up the display mode thatshows the filter type of the curr

A-107 Multitype Morphing Filter System A - 100doepfer84 ChainOperating this button calls up a chain from the me-mory, i.e. the chain is copied f

doepferSystem A - 100Multitype Morphing Filter A-1079H If you release the button while the display shows"PRG" the store procedure is int

A-107 Multitype Morphing Filter System A - 100doepfer108 Step ClockThe positive transition (low to high) of a Clock signalat this input advances

doepferSystem A - 100Multitype Morphing Filter A-107115. Filter Unit Controls! Audio In • Level ControlThe socket is the audio input of t

A-107 Multitype Morphing Filter System A - 100doepfer12normally one of the frequency peaks shown in theresponse curves is lifted up (see chapte

doepferSystem A - 100Multitype Morphing Filter A-107136. User examplesH In the following we use the abbreviations LP(lowpass), BP (bandpass), HP

A-107 Multitype Morphing Filter System A - 100doepfer14MorphingBut the real fun arises with the morphing features ofthe A-107. Even here we reco

doepferSystem A - 100Multitype Morphing Filter A-10715D Try different waveforms for the LFO that controlsthe step CV and increase the effect of t

2. Overall design System A - 100doepfer6In this case, double-check the connections, makingcompletely sure that the ribbon cable is the rightway roun

A-107 Multitype Morphing Filter System A - 100doepfer16Asymmetric Bandpass 2(18 dB LP + 6 dB HP)Bandpass(12 dB LP + 12 dB HP)Notch + 6 dB Lowpas

doepferSystem A - 100Multitype Morphing Filter A-10717Lowpass + 2 shifted Bandpas-ses with different amplitudes2 shifted Bandpasses with dif-feren

A-107 Multitype Morphing Filter System A - 100doepfer18Allpass (higher frequencies at-tenuated)Highpass with "step" "Wave" f

doepferSystem A - 1006/12/24/48 dB Low Pass A-10811. IntroductionModule A-108 is a completely new, unique voltage-controlled low pass/band pass fil

A-108 6/12/24/48 dB Low PassSystem A - 100doepfer22. VCF 8 - OverviewControls:1 Freq. : Manual frequency control2 CV 2 : Attenuator for frequency

doepferSystem A - 1006/12/24/48 dB Low Pass A-10833. Controls1 Freq.Control 1 is used to adjust the filter frequency manu-ally, i.e. the middle frequ

A-108 6/12/24/48 dB Low PassSystem A - 100doepfer4Fig. 2: Filter response curves (minimal resonance)Fig. 3: Filter response curves (middle resonanc

doepferSystem A - 1006/12/24/48 dB Low Pass A-10854. In / Outputs! Audio InThis is the filter’s audio input socket. Patch in theoutput from any soun

A-108 6/12/24/48 dB Low PassSystem A - 100doepfer65. User ExamplesThe filter’s cut-off frequency can be modulated invarious ways: e.g. ADSR (A-140,

doepferSystem A - 1006/12/24/48 dB Low Pass A-1087Fig. 5: Low pass filter with voltage controlled cut-off slope1A-135VC-MixerAudio Out234Audio Inext

doepferSystem A - 100 3. A-100 signal flow73. Signal flow in the A-1003.1 The Principles of Voltage ControlWhat makes analogue synthesizers (and m

A-108 6/12/24/48 dB Low PassSystem A - 100doepfer86. Changing the assignment of thefour low pass outputsOnly 4 output stages are available as this

doepferSystem A - 1006/12/24/48 dB Low Pass A-1089output 1 output 26 | 12 dB 18 | 24 dB 30 | 36 dB 42 | 48 dBoutput 3 output 4

A-108 6/12/24/48 dB Low PassSystem A - 100doepfer10A-108 VCF 8CV 3CV 1Freq.CV 2Emph.Feedb.0100100100106/12/24/48 dB Lowpass010AudioLevel6db LPC

doepferSystem A - 100VC Signal Processor A-10911. IntroductionModule A-109 is a voltage controlled audio signalprocessor containing the components

A-109 VC Signal ProcessorSystem A - 100doepfer22. OverviewA-109 VC Signal Processor24 dB Low Pass / VCA / Panning➋CV F2010010010010➊010010010010

doepferSystem A - 100VC Signal Processor A-1093Controls:1 Level : Attenuator for input signal at socket !(Audio In 1)2 Frq. : Manual control of fi

A-109 VC Signal ProcessorSystem A - 100doepfer4Fig. 1: A-109 structureResonanceAudioOutFrequencyVCFAmplitudeCV 1CV 2man.CV 1CV 2man.Audio In 1Audi

doepferSystem A - 100VC Signal Processor A-10953. Controls1 LevelUse this attenuator to control the amount of signalentering the filter input "

A-109 VC Signal ProcessorSystem A - 100doepfer64 Res.With this control you adjust the filter’s resonance (oremphasis or Q factor) - the parameter w

doepferSystem A - 100VC Signal Processor A-1097The actual panning setting results from the sum of themanual control 8 and the external control input

3. A-100 signal flow System A - 100doepfer8As well as modules which can be affected by voltagecontrol, there are other modules like the ADSR andLFO w

A-109 VC Signal ProcessorSystem A - 100doepfer8If you patch a modulation source (eg LFO, ADSR) tothese inputs, the cut-off frequency of the filter

doepferSystem A - 100VC Signal Processor A-1099( Pan InThis socket is the audio input of the Panning sec-tion. It is internally connected to the VCA

A-109 VC Signal ProcessorSystem A - 100doepfer106. Patch-SheetThe following diagram of the modules can help yourecall your own Patches. They’re des

doepferSystem A - 100VCO A-11011. IntroductionModule A-110 (VCO) is a voltage-controlled oscilla-tor.This VCO’s frequency range is about ten octave

A-110 VCOSystem A - 100doepfer22. VCO OverviewControls:1 Range: 5-position Octave or Footage switch2 Tune: Fine tuning control3 CV 2: Attenuator

doepferSystem A - 100VCO A-11033. BasicsModule A-110 puts out four waveforms simultaneously.All these signals have the same pitch, since all arecon

A-110 VCOSystem A - 100doepfer4A symmetrical Pulse wave (i.e. an exact squarewave, with a pulse width of 50 %), has only oddharmonics of its fundam

doepferSystem A - 100VCO A-1105Sine WaveSine waves are pure waves: they just contain thefundamental, without any harmonics (see Fig. 5). Theyare th

A-110 VCOSystem A - 100doepfer64. Controls1 RangeFootage (the octave of the fundamental) is controlledwith this knob. Five settings are available,

doepferSystem A - 100VCO A-11075. In / Outputs! SYNCSocket ! is the Sync Input for the VCO. What syncmeans in this context is that the waveform of

doepferSystem A - 100 3. A-100 signal flow9Trigger or Gate Signals, which start a process orfunction, are typically from 0 V to +5V or 0V to +12 V,w

A-110 VCOSystem A - 100doepfer8Input " is normally connected to a control voltagegoverning pitch (for instance from a MIDI-CV interface,or a m

doepferSystem A - 100VCO A-11096. User examplesFM in the audio rangeUsing audio range oscillators for FM can produceinteresting sounds. Thanks to

A-110 VCOSystem A - 100doepfer10Fig. 9: exponential FM using the A-110With FM in the audio range, the ear doesn’t resolvethese octave transitions,

doepferSystem A - 100VCO A-11011Pulse Width ModulationIf you modulate the pulse width of a square wave withan LFO or ADSR (Pulse Width Modulation, o

A-110 VCOSystem A - 100doepfer127. Patch-SheetThe following diagrams of the module can help yourecall your own Patches. They’re designed so thata c

doepferSystem A - 100VCO 2 A-11111. IntroductionModule A-111 (VCO 2) is a voltage controlled oscil-lator.The VCO has a range of about 12 octaves, a

A-111 VCO 2System A - 100doepfer22. VCO 2 - OverviewControls:1 Range : 7-position switch for octave selection2 Tune : Control for coarse tuning3

doepferSystem A - 100VCO 2 A-11133. Basics3.1 WaveformsModule A-111 puts out four waveforms simulta-neously. All these signals have the same pitch

A-111 VCO 2System A - 100doepfer4Fig. 3: Harmonic spectrum of a true square waveThe further the pulse width deviates from 50% (seeFig. 2, b and c),

doepferSystem A - 100VCO 2 A-1115Sine waveSine waves are pure waves: they just contain thefundamental, without any harmonics (see Fig. 5).They are t

3. A-100 signal flow System A - 100doepfer10If on the other hand you’d like to have the sameinternal CV and gate available on two busses atonce, you

A-111 VCO 2System A - 100doepfer6Completely different sounds will emerge, though, if themodulation frequency is in the audio range.Exponential FM i

doepferSystem A - 100VCO 2 A-1117Fig. 8: Exponential FM in the audio rangeWhenever you change pitch using exponential FM, theinevitable side effect

A-111 VCO 2System A - 100doepfer8Fig. 9: fM = fCFig. 10: fM = 2 x fCIf you choose non-related frequencies for the carrierand modulator, you can p

doepferSystem A - 100VCO 2 A-1119If it’s the other way round, and the slave is at a higherfrequency than the master (fM < fS) then it still follo

A-111 VCO 2System A - 100doepfer10Soft SyncIn contrast with hard sync, soft sync produces nochange in the waveform of the slave VCO. Themaster VCO s

doepferSystem A - 100VCO 2 A-111114. Controls1 RangeFootage (the octave of the fundamental) is controlledwith this knob. Seven settings are availab

A-111 VCO 2System A - 100doepfer125. In- / Outputs! CV 1 • " CV 2Sockets ! and " are the voltage control inputs forcontrolling

doepferSystem A - 100VCO 2 A-11113$ H-Sync • % S-SyncSockets $ and % are the synchronisation inputs.Socket $ is for hard sync, and socket

A-111 VCO 2System A - 100doepfer147. AppendixThe diagram on the right shows the layout of the A-111main circuit board.If you want to disconnect the

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Synthesizer Voice A-111-51Fig. 1: A-111-5 sketch1. Introduction

doepferSystem A - 100 3. A-100 signal flow11If your A-100 consists of more than one case only youmay want to have a common CV and/or Gate busavailab

Synthesizer Voice A-111-5 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER2Module A-111-5 is a complete monophonic synthesizermodule that includes these comp

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Synthesizer Voice A-111-53VCA• manual amplitude control• AM (amplitude modulation) control with modulation

Synthesizer Voice A-111-5 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER4Remarks:• As the LFO frequencies can go up to moderate audiorange (~ 5kHz) even a

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Synthesizer Voice A-111-552. OverviewFig. 2:Front Panel(full view)

Synthesizer Voice A-111-5 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER61Fig. 2a: Front Panel(VCO and VCF)1 VCO Tune2 VCO Range Switch (Octave Switch)3a V

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Synthesizer Voice A-111-5716171213a1813b14c1914a14b15c2015aFig. 2b: Front Panel(VCA, LFO, ADSR)12 VCA Amplit

Synthesizer Voice A-111-5 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER81Fig. 2c: Frontpanel (Inputs and Outputs)1 VCO Frequency Control Input (1V/Octave)

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Synthesizer Voice A-111-593. In- / Outputs 1 VCO Frequency Control Input (1V/Octave)This input is used to co

Synthesizer Voice A-111-5 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER10controls 12 and 13b are fully CCW). To reduce thesensitivity of this CV input an

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Synthesizer Voice A-111-5114. Controls 1 VCO Tune 2 VCO Range Switch (Octave Switch) 3a VCO FM Source Switc

3. A-100 signal flow System A - 100doepfer123.4 Integrating the A-100 with MIDISeveral interface modules are available to connect theA-100 with MID

Synthesizer Voice A-111-5 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER12 5 VCO Rectangle Pulsewidth 6a VCO Pulsewidth Modulation Source 6b VCO Pulsewidt

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Synthesizer Voice A-111-513 7 VCF Frequency 8 VCF Tracking Switch 9a VCF exponential FM Source Switch 9b VC

Synthesizer Voice A-111-5 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER14In addition to the internally generated frequency of the filterthe control voltag

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Synthesizer Voice A-111-515 12 VCA Amplitude (Manual Gain) 13a VCA AM Source Switch 13b VCA AM LevelThis gr

Synthesizer Voice A-111-5 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER16 14a LFO1 Frequency 14b LFO1 Frequency Range Switch 14c LFO1 Waveform SwitchThis

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Synthesizer Voice A-111-517 16 ADSR Range Switch 17 ADSR Attack Time 18 ADSR Decay Time 19 ADSR Sustain Lev

Synthesizer Voice A-111-5 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER186. User ExamplesBasic position

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Synthesizer Voice A-111-519The basic position of the controls shown on the previouspage is a good starting p

Synthesizer Voice A-111-5 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER20Appendix: Position and function of the jumpers (JPx) and trimming potentiometers

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Synthesizer Voice A-111-521Jumper OverviewName Function Explanation Factory defaultJP1 A-100 Bus Bus connect

doepferSystem A - 1004. A-100 Basic System134. A-100 Basic SystemsIt’s not in the nature of modular systems to have hardand fast rules about whic

Synthesizer Voice A-111-5 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER22Trimming Potentiometers OverviewName Function Explanation Factory defaultP17 VCO

doepferSystem A - 100Sampler A-11211. IntroductionModule A-112 (SAMPLER) is a combination module,including a voltage controlled 8 bit Sampler and a

A-112 SamplerSystem A - 100doepfer2Sampling modeIn sampling mode the incoming audio signal is sam-pled with a sampling frequency that is controlledm

doepferSystem A - 100Sampler A-11232. SAMPLER OverviewControls:1 Atten. : Attenuator for Audio/Wave CVInput !2 Tune : Manual control for Samplin

A-112 SamplerSystem A - 100doepfer43. Controls1 Atten.Control 1 attenuates the level of the voltage at input!. Depending upon the mode this voltage

doepferSystem A - 100Sampler A-11255 Switch • 6 Switch • 7 SwitchWith the 3-position switches 4 to 6 the operatingmode is selecte

A-112 SamplerSystem A - 100doepfer6• Normal record modeIn this mode an audio signal at audio input 1 isrecorded into one of the 2 memory banks S1 o

doepferSystem A - 100Sampler A-1127Gate = low:The module is waiting for gate = high; LED 3 is off(see fig. 1 - a).Gate = high:When the gate level c

A-112 SamplerSystem A - 100doepfer8In this case the record starts again at the first memoryaddress. This loop continues (LED 3 on) until gateturns l

doepferSystem A - 100Sampler A-1129• Wave record modeIn this mode one or more wavetables are recordedinto the memory bank selected.The number of th

EWarning:Inside the A-100 cases are dangerous voltages. Itis essential to take careful note of the followingsafety instructions:• Before opening up

4. A-100 BS Basic systemSystem A - 100doepfer14

A-112 SamplerSystem A - 100doepfer10In fig. 3, the CV input is fed from the sine output of aLFO. The sampling frequency is 32kHz, the LFO fre-quency

doepferSystem A - 100Sampler A-11211i.e. the next wavetable and the next sampling fre-quency are determined. This continues until the gategoes low.W

A-112 SamplerSystem A - 100doepfer12H During Data transmission via MIDI OUT theMIDI input and gate are not scanned. There-fore a new dump cannot be

doepferSystem A - 100Sampler A-11213The length of the delay memory is defined by theparameter Len (see below). The maximum length isthe complete

A-112 SamplerSystem A - 100doepfer14H All functions and controls (sampling fre-quency, length of delay memory ...) are thesame as in the normal dela

doepferSystem A - 100Sampler A-11215• Freeze optionThe effect modes delay, reverse delay and pitch shiftmay also run with the Freeze option.In this

A-112 SamplerSystem A - 100doepfer16right (cw position 10) it corresponds to the wholememory (64 kbyte or 256 pages). During the adjust-ment of Len

doepferSystem A - 100Sampler A-11217H The gate signal applied to this socket is inter-nally connected with the signal coming from thebutton 4. If ei

A-112 SamplerSystem A - 100doepfer18F000 20 20 Doepfer SysEx-ID7D< Wave-Nr., Bit 7 - 1 >< Wave-Nr., Bit 0 >F7As the data range in a Sy

doepferSystem A - 100Sampler A-11219The control voltage range 0...+5V corresponds to the256 tables (0V = table no. 1, +5V = table no. 256). Tomove f

doepferSystem A - 100 5. AccessoriesSubject to change without notice15Part DescriptionA-100BUS Separate system busOne bus board with 14 connectors fo

A-112 SamplerSystem A - 100doepfer20Wavetable playback of a normal sampleVery interesting sounds can be obtained if a normalsample is played back in

doepferSystem A - 100Sampler A-11221fig. 6: sequencer-controlled wavetable playbackVC-ADSRVCAVCFClo c k1 234 5 6 7 8Trig. 1Po st Out 1LFOGat eA-15

A-112 SamplerSystem A - 100doepfer226. A-112 Sample Dump LoaderThe A-112 MIDI interface enables the transfer of sam-ple and wave data from and to

doepferSystem A - 100Sampler A-11223fig. 7: A-112 sample dump loader

A-112 SamplerSystem A - 100doepfer247. Patch-SheetThe following diagrams of the module can help yourecall your own Patches. They’re designed so tha

doepferSystem A - 100Subharmonic Generator A-11311. IntroductionModule A-113 (Subharmonic Generator) is an addi-tional sound source that derives fo

A-113 Subharmonic GeneratorSystem A - 100doepfer22. Basic principlesThe Subharmonic Generator A-113 contains four ti-mes the following elements (se

doepferSystem A - 100Subharmonic Generator A-1133SubharmonicsThe subharmonics result from integer division ofthe frequency of the input signal.The t

A-113 Subharmonic GeneratorSystem A - 100doepfer4H The term "subharmonic" is not quite correct asthe A-113 outputs are sawtooth waveforms

doepferSystem A - 100Subharmonic Generator A-11352. OverviewControls:1 Display : displays the current divisor2 Up : button to increase the diviso

5. Accessories System A - 100doepfer16Subject to change without noticePart DescriptionA-100C ...Patch leadLeads with two moulded 3.5mm plugsC15: 15

A-113 Subharmonic GeneratorSystem A - 100doepfer63. Controls1 DisplayThis is the 2-digit LED display that shows the currentvalue of the divisor.In

doepferSystem A - 100Subharmonic Generator A-11375 PresetWhile button 5 is operated one reaches the presetmode (see chapter 2 concerning the term pr

A-113 Subharmonic GeneratorSystem A - 100doepfer84. In / Outputs! InSocket ! is the subharmonic generator’s audio input.Connect up the signal you w

doepferSystem A - 100Subharmonic Generator A-11395. User ExamplesSimulation of a Mixtur-TrautoniumThe Trautonium is an electronic musical instrumen

A-113 Subharmonic GeneratorSystem A - 100doepfer10Fig. 8 : Schematic construction of the Mixtur-Trautonium sound generation(part 2 see next page)

doepferSystem A - 100Subharmonic Generator A-11311

A-113 Subharmonic GeneratorSystem A - 100doepfer12Fig. 9: A-113 as a complex sound sourceA-135VC-MixerAudioOutAudioIn 1A-113SHG4SingleOut 1XYZMODV

doepferSystem A - 100Dual Ring Modulator A-11411. IntroductionModule A-114 (Dual Ring Modulator) contains twoseparate ring modulators.A ring modul

A-114 Dual Ring ModulatorSystem A - 100doepfer22. Dual Ring Modulator - OverviewIn / Outputs:! X In : Signal input" Y In : Signal input§ X*

doepferSystem A - 100Dual Ring Modulator A-11433. In / Outputs! X In • " Y InSockets ! and " are the signal inputs for the A-11

doepferSystem A - 100 6. Standard items included176. Items included as standardA-100 Basic Systems• Case A-100G6 or A-100P6• All modules specified

A-114 Dual Ring ModulatorSystem A - 100doepfer4Ring modulation of audio signalsA ring modulator is very good at doing weird things toaudio signals (

doepferSystem A - 100Dual Ring Modulator A-1145“Glissando ring modulation”The patch in Fig. 3. produces some interestingsounds. Input two VCOs set t

A-114 Dual Ring ModulatorSystem A - 100doepfer65. Patch-SheetThe following diagrams of the module can helpyou recall your own Patches. They’re desig

doepferSystem A - 100DIVIDER A-11511. IntroductionModule A-115 (DIVIDER) is a four-way frequencydivider.The frequency of a signal at the input is

A-115 DIVIDERSystem A - 100doepfer22. DIVIDER - OverviewControls:1 Orig. : Attenuator controlling the amount ofthe original input signal present a

doepferSystem A - 100DIVIDER A-11533. Controls1 Orig.This attenuator controls the amount of the originalinput signal present in the mix output.2 F /

A-115 DIVIDERSystem A - 100doepfer4Frequency division of external audioThe patch in Fig. 2 shows how the A-115 canfrequency-divide an external monop

doepferSystem A - 100VC Waveform Processor A-11611. IntroductionModule A-116 (Voltage Controlled Waveform Pro-cessor) provides voltage-controlled

A-116 VC Waveform ProcessorSystem A - 100doepfer22. VC Waveform Processor - OverviewControls:1 Lev. : Input ! amplifier level control2 Clipping L

doepferSystem A - 100VC Waveform Processor A-11633. Controls1 Lev.The input amplifier’s gain can be set with attenuator1. Since the gain amount is

6. Standard items included System A - 100doepfer18

A-116 VC Waveform ProcessorSystem A - 100doepfer4Fig. 2:In this example, a triangle wave is symmetricallyamplified by the internal symmetry VCA, wit

doepferSystem A - 100VC Waveform Processor A-1165• LFO (sine wave) for Symmetry,LFO (square wave) for Clipping Level• RANDOM for Clipping Level,Modu

A-116 VC Waveform ProcessorSystem A - 100doepfer6Input SignalSignal after ClippingSignals behind Symmetry-VCA with several gainsettings 'v&apo

doepferSystem A - 100Digital Noise Generator A-11711. IntroductionModule A-117 (DNG) is a combination module, inclu-ding a digital noise generator

A-117 Digital Noise GeneratorSystem A - 100doepfer22. DNG / 808 - OverviewControls:1 Rate : Pulse rate control for random clock /noise output !In

doepferSystem A - 100Digital Noise Generator A-11733. Controls1 RateThis is used to adjust the pulse rate of the randomclocks generated. At low pul

A-117 Digital Noise GeneratorSystem A - 100doepfer45. User examplesModule A-117 is an inexhaustible source of scraping,lip-smacking, bell or other

doepferSystem A - 100Digital Noise Generator A-1175Change the band pass for a high pass filter, put thecut-off to high and the resonance to minimum,

A-117 Digital Noise GeneratorSystem A - 100doepfer6"Octave noise"Patch the digital noise into an A-115 Audio Dividerand create extra sub-o

doepferSystem A - 100NOISE / RANDOM A-11811. IntroductionModule A-118 (NOISE / RANDOM) is (as you mighthave guessed) a noise and random voltage ge

doepferSystem A - 100 7. Further reading197. Further readingThe resources in the following list should help youincrease your knowledge of analog sy

A-118 NOISE / RANDOMSystem A - 100doepfer22. NOISE / RANDOM - OverviewControls:1 Blue: Control for blue noise component atcolored noise output &qu

doepferSystem A - 100NOISE / RANDOM A-11833. ControlsThe A-118 produces white and colored noise. Whitenoise contains all audio frequencies, at rand

A-118 NOISE / RANDOMSystem A - 100doepfer4Fig. 2: Random voltage with Rate = 0Fig. 3: Random voltage with Rate = 104 LevelThe amplitude of the sig

doepferSystem A - 100NOISE / RANDOM A-11855. User examplesThe A-118 as wind FX generatorD Patch the A-118 into an A-120 VCF as below. SetCV2 to z

A-118 NOISE / RANDOMSystem A - 100doepfer66. Patch-SheetThe following diagrams of the module can helpyou recall your own Patches. They’re designed

doepferSystem A - 100Ext. Input / Envelope Follower A-11911. IntroductionModule A-119 (External Input / Envelope Follower)is designed to allow exte

A-119 Ext. Input / Envelope FollowerSystem A - 100doepfer22. A-119 - OverviewControls and indicators:1 Gain : Control for input signal level2 Ov

doepferSystem A - 100Ext. Input / Envelope Follower A-11933. The Envelope Follower: how it worksThe external audio signal (see Fig. 1a) is patched

A-119 Ext. Input / Envelope FollowerSystem A - 100doepfer4As soon as the envelope amplitude exceeds the trig-ger threshold T, the gate signal is out

doepferSystem A - 100Ext. Input / Envelope Follower A-1195§ Audio Out • $ Audio OutThe external audio signal, amplified by an amount setby

7. Further reading System A - 100doepfer20Specialist books in GermanKrebs, Das große Buch zum Doepfer A-100, Ideen-hase Verlag, 2011Anwander, Synthe

A-119 Ext. Input / Envelope FollowerSystem A - 100doepfer6Ring modulator squelch patchA ring modulator works particularly well with externalaudio s

doepferSystem A - 100Ext. Input / Envelope Follower A-1197“Ducking”, using an external signalIn the patch in Fig. 4 the amplitude of an external aud

A-119 Ext. Input / Envelope FollowerSystem A - 100doepfer8

doepferSystem A - 100VCF 1 A-12011. IntroductionModule A-120 (VCF 1) is a voltage controlled low-pass filter, which filters out the higher parts of

A-120 VCF 1System A - 100doepfer22. VCF 1 - OverviewControls:1 Freq.: Cut-off frequency control2 CV 2: Attenuator for CV at input "3 CV 3:

doepferSystem A - 100VCF 1 A-12033. Controls1 Freq.With this control you adjust the Cut-Off Frequency fc,above which the filter attenuates all frequ

A-120 VCF 1System A - 100doepfer4Fig. 2: How resonance affects the response of a lowpass filter4. In / Outputs! CV 1Socket CV 1 is the filter’s sta

doepferSystem A - 100VCF 1 A-12055. User examplesThe filter’s cut-off frequency can be modulated invarious ways:• VCF - LFOModulation of the cut-o

A-120 VCF 1System A - 100doepfer6

doepferSystem A - 100VCF 2 A-12111. IntroductionModule A-121 (VCF 2) is a voltage-controlled multi-mode filter with a cut-off slope of -12 dB / oct

doepferSystem A - 100 8. Module overview218. Module Overview(as of May 2014)The following table may be used for planning andarranging an A-100 sys

A-121 VCF 2System A - 100doepfer22. VCF 2 - OverviewControls:1 Audio Level : Input signal attenuator2 Freq. : Cut-off frequency control3 FCV 2 :

doepferSystem A - 100VCF 2 A-12133. BasicsLow PassThe most common type of filter in analogue soundproduction is the low-pass, which filters out the

A-121 VCF 2System A - 100doepfer4ResonanceAnother filter parameter is resonance, also known asemphasis or Q. As the value for Q gets higher, thefr

doepferSystem A - 100VCF 2 A-12154. Controls1 Audio LevelThis attenuator controls the input level of the signal tobe filtered, entering the module a

A-121 VCF 2System A - 100doepfer65. In / Outputs! Audio InThis socket is the filter’s audio input. Patch theoutput of a sound source (such as a VCO

doepferSystem A - 100VCF 2 A-12176. User examplesThe A-121’s cut-off frequency can be modulated in avariety of ways:• VCF - LFOModulation of the c

A-121 VCF 2System A - 100doepfer8Generating vocal effectsWith the patch in Fig. 4 (see next page) vocal effectscan be produced, using two A-121 filt

doepferSystem A - 100VCF 2 A-1219Fig. 4: Producing vocal-like soundsP Check out various different combinations ofmid-frequency settings on the filt

A-121 VCF 2System A - 100doepfer107. Patch-SheetThe following diagrams of the module can help yourecall your own Patches. They’re designed so thata

doepferSystem A - 100 A-105 / A-12211. IntroductionThe modules A-105 and A-122 are voltage-controlled low-pass filters, which filter out the highe

8. Module Overview System A - 100doepfer22Module Width Curr. Curr.@5V DescriptionA-10812 40 -6/12/24/48 dB Low Pass / Band Passvoltage controlled lo

A-105 / A-122 System A - 100doepfer22. VCF 3 - OverviewControls:1 Lev. : Attenuator for audio input !2 Frq. : Cut-off frequency control3 FCV : At

doepferSystem A - 100 A-105 / A-12233. Controls1 Lev.Use this attenuator to control the amount of signalentering the filter input $.H If the filter

A-105 / A-122 System A - 100doepfer4At close to maximum resonance, the filter starts toself-oscillate, and behaves like a sine wave oscilla-tor. Th

doepferSystem A - 100 A-105 / A-1225$ QCVThis socket is the voltage control input for the filter’sresonance.If you patch a modulation source (eg LFO,

A-105 / A-122 System A - 100doepfer6A-121 multi-mode filter’s 12 dB) with voltage control-led resonance.To create a bandpass filter, put both modules

doepferSystem A - 100 Wasp Filter (VCF 5) A-12411. IntroductionModule A-124 (WASP FILTER) is a special voltage-controlled multimode filter with a c

A-124 Wasp Filter (VCF 5)System A - 100doepfer22. VCF 5 - OverviewControls:1 Audio Level : Input signal attenuator2 Frq. : Cut-off frequency cont

doepferSystem A - 100 Wasp Filter (VCF 5) A-12433. BasicsModule A-124 contains three filter types: low-pass,high-pass and band-pass. Low-pass and h

A-124 Wasp Filter (VCF 5)System A - 100doepfer44. Controls1 Lev.This attenuator controls the input level of the signal tobe filtered, entering the m

doepferSystem A - 100 Wasp Filter (VCF 5) A-12455 MixMix control 5 adjusts the relative amounts of low-passand high-pass signals appearing at the LP

doepferSystem A - 100 8. Module overview23Module Width Curr. Curr.@5V DescriptionA-122820 -24 dB Low Pass 2 (combined manual A-105/A-122)voltage con

A-124 Wasp Filter (VCF 5)System A - 100doepfer6% LP/HP OutThis is the mixed low-pass/high-pass output.6. User examplesThe A-124’s cut-off frequency

doepferSystem A - 100VC Phaser A-12511. IntroductionModule A-125 (VC Phaser) is a voltage controlledphase shifter.Phase shifting can be controlled

A-125 VC PhaserSystem A - 100doepfer22. VC Phaser - OverviewControls:1 Level : Attenuator to control the level of thesignal at input !2 Shift : C

doepferSystem A - 100VC Phaser A-12533. Basic principlesThe phasing process relies on dynamic comb filtering.The comb filtering produces a series o

A-125 VC PhaserSystem A - 100doepfer4 4. Controls1 LevelAttenuator 1 controls the level of the input signal.2 ShiftPhase shift amount is controlled

doepferSystem A - 100VC Phaser A-12555. In / Outputs! Audio InSocket ! is the phaser’s audio input." CVThe control voltage for modulating the

A-125 VC PhaserSystem A - 100doepfer6The phaser is simply inserted in the audio path likethis. For modulation sources, you could use, forinstance,

doepferSystem A - 100Triple VC Resonance Filter A-12711. IntroductionModule A-127 is a Voltage-Controlled Triple Reso-nance Filter), consisting of

A-127 Triple VC Resonance FilterSystem A - 100doepfer2A-127 VCRF Triple Voltage Controlled Resonance FilterLFO Frq.AudioIn010010010010010010010

doepferSystem A - 100Triple VC Resonance Filter A-1273Controls:1 A. In Level : Input signal attenuator per VCF:2 LFO Frq. : LFO frequency control

ment in a humid or wet environment nor nearinflammables.• Do not use this instrument in damp environments,or close to water.• No liquids or conducti

8. Module Overview System A - 100doepfer24Module Width Curr. Curr.@5V DescriptionA-132-1420 -Dual Low Cost VCAtwo simple voltage controlled amplifie

A-127 Triple VC Resonance FilterSystem A - 100doepfer43. Basic functionThe A-127 is a triple resonant filter containing threeband-pass filters each

doepferSystem A - 100Triple VC Resonance Filter A-12754. Controls1 Audio In LevelWith the attenuator 1 you can set the level of theaudio signals com

A-127 Triple VC Resonance FilterSystem A - 100doepfer6If the module has been re-configured to be a lowpass filter, control 6 boosts the frequencies

doepferSystem A - 100Triple VC Resonance Filter A-1277§ Audio OutEach filter Audio output § sends out the signalprocessed by the particular filter

A-127 Triple VC Resonance FilterSystem A - 100doepfer8• S&H filter effects with an A-148the A-148 Sample&Hold samples signals from mo-dulat

doepferSystem A - 100Triple VC Resonance Filter A-1279fig. 4: German vowel formant frequency range.In the patch in fig. 5, this process is simulated

A-127 Triple VC Resonance FilterSystem A - 100doepfer10fig. 5: Simulation of vowel soundsOtherwise, three vowel formant frequencies can beproduced u

doepferSystem A - 100Triple VC Resonance Filter A-127117. AppendixAltering the filter characteristicsThe characteristics of each of the indifividua

A-127 Triple VC Resonance FilterSystem A - 100doepfer12Changing how control 1 worksAs standard from the factory, Attenuator 1 doesn’thave any effect

doepferSystem A - 100Fixed Filter Bank A-12811. IntroductionModule A-128 (Fixed Filter Bank) is a filter bank,made up of 15 parallel band pass filt

doepferSystem A - 100 8. Module overview25Module Width Curr. Curr.@5V DescriptionA-139 8 100 -Headphone Amplifier (module no longer available)stereo

A-128 Fixed Filter BankSystem A - 100doepfer22. A-128 - OverviewControls:1 50 ... 11000 : Amplitude controls (attenuators) forthe individual band

doepferSystem A - 100Fixed Filter Bank A-12833. Controls1 Controls 50 Hz ... 11 kHzWith these controls you can set the amplitude of eachof the 15 b

A-128 Fixed Filter BankSystem A - 100doepfer45. User examplesThe main purpose of the Fixed Filter Bank is forchanging the colour of an audio signal

doepferSystem A - 100Fixed Filter Bank A-1285Creating a multi-band equalizerThe patch in Fig. 4 shows how to model a simplegraphic equalizer. An A-

A-128 Fixed Filter BankSystem A - 100doepfer66. Patch-SheetThe following diagrams of the module can helpyou recall your own Patches. They’re desig

doepferSystem A - 100Modular Vocoder A-129 /1/211. IntroductionThe A-129 /x series of modules forms a modularvocoder. ‘Vocoder’ is an abbreviation

A-129 /1/2 Modular VocoderSystem A - 100doepfer22. A-129 /1, /2 - OverviewA-129 /2 VOC-SBand 1Low PassBand 2Band 3Band 4Band 5Band 6Band 7Band

doepferSystem A - 100Modular Vocoder A-129 /1/23In / Outputs:A-129 /1! Speech In : Input for the speech signal" CV Outputs : 15 CV outputs w

A-129 /1/2 Modular VocoderSystem A - 100doepfer43. Basic principlesThe fundamental modules in this vocoder are theanalysis section A-129 /1 and the

doepferSystem A - 100Modular Vocoder A-129 /1/25H In most standard vocoders the voltage si-gnals from the analysis section are fedstraight into the

8. Module Overview System A - 100doepfer26Module Width Curr. Curr.@5V DescriptionA-148420 -Dual S&Htwo independent sample & hold devicesA-14

A-129 /1/2 Modular VocoderSystem A - 100doepfer6§ High PassSocket § on the analysis section is the high passfilter output. Unlike the other sockets

doepferSystem A - 100Modular Vocoder A-129 /1/275. User examplesBasic principlesTo get the best results from the vocoder, it’s essentialto take not

A-129 /1/2 Modular VocoderSystem A - 100doepfer8Using just the basic modulesJust with the A-129 /1 and A-129 /2 modules (and anA-119 external input)

doepferSystem A - 100Modular Vocoder A-129 /1/29Fig. 3: "Frequency displacement""Chopped up” speechThe patch in Fig. 4 produces chopp

A-129 /1/2 Modular VocoderSystem A - 100doepfer10Using with the other modules ( /3, /4, /5)While extremely usable vocoder sounds can be produ-ced wi

doepferSystem A - 100Modular Vocoder A-129 /3/411. IntroductionThe A-129 /x series of modules is a modular voco-der. The crucial components are th

A-129 /3/4 Modular VocoderSystem A - 100doepfer22. A-129 /3, /4 - OverviewA-129 /3 Vocoder Slew-LimiterCV In 1➀➁01001001001001001001001001001

doepferSystem A - 100Modular Vocoder A-129 /3/43A-129 /3In- / Outputs:! CV In 1 ... CV In 5 : CV inputs" CV Out 1 ... CV Out 5 : CV outputs§

A-129 /3/4 Modular VocoderSystem A - 100doepfer43. Controls and indicators1 AttenuatorUse Attenuator 1 to lower the signal at the corre-sponding

doepferSystem A - 100Modular Vocoder A-129 /3/45Fig. 2: Slew rate explanatory diagram(Attenuator=10, Offset=0)With the control set at 0, the output

doepferSystem A - 100 8. Module overview27Module Width Curr. Curr.@5V DescriptionA-165420 -Dual Trigger Modifiertwo independent trigger modifiers (i

A-129 /3/4 Modular VocoderSystem A - 100doepfer64. In- / Outputs! CV In 1 ... CV In 5Sockets ! are CV inputs. This is where you patch inthe volta

doepferSystem A - 100Modular Vocoder A-129 /3/47% Slew CVInput % is where the CV should be patched in tocontrol the slew rate. The amplitude of the

A-129 /3/4 Modular VocoderSystem A - 100doepfer8Further adventures in vocoder controlUsing the layout in Fig. 4 (and also not forgettingthe tips and

doepferSystem A - 100Modular Vocoder A-129 /3/49P Because as a modular vocoder the A-129 istotally open-ended, it would be wrong to beprescriptive a

A-129 /3/4 Modular VocoderSystem A - 100doepfer10

doepferSystem A - 100 Voiced/Unvoiced Detector A-129 /511. IntroductionThe A-129 /x series of modules, whose essentialcomponent parts are the A-129 /

A-129 /5 Voiced/Unvoiced Detector System A - 100doepfer22. Voiced/Unvoiced Detector overviewControls:1 Gain : gain control for the speech inputsign

doepferSystem A - 100 Voiced/Unvoiced Detector A-129 /533. Controls1 GainUse control 1 to set the level of input gain for thespeech signal at socket

A-129 /5 Voiced/Unvoiced Detector System A - 100doepfer4$ Unvoiced InputThis unvoiced carrier signal input $ is used to patchin the sound source you

doepferSystem A - 100 Voiced/Unvoiced Detector A-129 /55fig. 2: diagram showing how to patch the A-129 /5A-119A-138LPBP 1BP 2BP 12BP 13HPLPBP 1BP 2BP

8. Module Overview System A - 100doepfer28Module Width Curr. Curr.@5V DescriptionA-180-14- -Multiples 4HP8-fold multi connector (may be splitted int

A-129 /5 Voiced/Unvoiced Detector System A - 100doepfer6

doepferSystem A - 100VCA A-130 / A-13111. IntroductionModules A-130 (Linear VCA) and A-131 (Exp. VCA)provide voltage-controlled amplification.H Thi

A-130 / A-131 VCASystem A - 100doepfer22. VCA - overviewControls:1 Gain: Overall gain control2 CV 2: CV attenuator for input "3 IN 1: Atten

doepferSystem A - 100VCA A-130 / A-13133. ControlsThe A-130 has a linear response: the amplification isin direct linear proportion to the control vo

A-130 / A-131 VCASystem A - 100doepfer4Fig. 3: VCA output level at different gain settings.2 CV 2This attenuator affects the level of voltage contro

doepferSystem A - 100VCA A-130 / A-13155. User examplesTypical voltage controlled amplificationA standard VCA patch is shown in Fig. 4. An ADSRenv

A-130 / A-131 VCASystem A - 100doepfer6The voltage control input A to the modulation depthVCA can come from an ADSR, MIDI controller, etc..Fig. 6:

doepferSystem A - 100Dual Low Cost VCA A-13211. IntroductionModule A-132 (Dual Low Cost VCA) contains twovoltage controlled amplifiers, with a lin

A-132 Dual Low Cost VCASystem A - 100doepfer22. Dual Low Cost VCA - OverviewIn / Outputs:! CV 1 : Input 1 for amplification CV" CV 2 : Input

doepferSystem A - 100Dual Low Cost VCA A-13233. In / Outputs! CV 1 • " CV 2Sockets ! and " are the VCA’s control voltageinputs.

doepferSystem A - 100 8. Module overview29Module Width Curr. Curr.@5V DescriptionA-190-410 200-MIDI/USB-CV/Gate/SYNC-InterfaceMIDI/USB-to-CV/Gate/sy

A-132 Dual Low Cost VCASystem A - 100doepfer4MIDI-controlled VCF or VCA envelopeamountOne important use of the A-132 is to control a VCF orVCA envel

doepferSystem A - 100Dual VC Polarizer A-13311. IntroductionModule A-133 (Dual VC Polarizer) is a special dualvoltage controlled amplifier that en

A-133 Dual VC PolarizerSystem A - 100doepfer22. OverviewControls and indicators:1 LEDs : negative/positive amplification display(not a signal di

doepferSystem A - 100Dual VC Polarizer A-13333. Controls and Indicators1 LEDsThe two LEDs indicate the amplification of the pola-rizer in question

A-133 Dual VC PolarizerSystem A - 100doepfer4ons would cause clipping for all standardA-100 signals (like LFOs, ADSRs or VCOs).If the amplificatio

doepferSystem A - 100Voltage Controlled Panning A-13411. IntroductionModule A-134 (PAN) is designed to provide voltage-controlled panning for audio

A-134 Voltage Controlled PanningSystem A - 100doepfer22. PAN - OverviewControls and indicators:1 LEDs : status indicators for audio output2 Pan : m

doepferSystem A - 100Voltage Controlled Panning A-13433. Basic layoutThe A-134 provides both manual and voltage-controlled panning. It basically con

A-134 Voltage Controlled PanningSystem A - 100doepfer4Table 1: Input mixing modeOutput panning mode:In this mode, the left LED monitors the left aud

doepferSystem A - 100Voltage Controlled Panning A-13455. In- / Outputs! CV 1 • " CV 2Inputs ! and/or " are for the control voltag

8. Module Overview System A - 100doepfer30

A-134 Voltage Controlled PanningSystem A - 100doepfer6• SequencerPanning controlled by voltages put out by a se-quencer such as the A-155.In the pat

doepferSystem A - 100Voltage Controlled Panning A-1347Fig. 3: Randomly making a sound more harsh or ra-sping each time a note is pressed.Fig. 4: Pan

A-134 Voltage Controlled PanningSystem A - 100doepfer8Fig. 5: Output panning using a sequencer.ADSRVCAVCFClockVCO1 2 3 4 5 6 7 8Trig. 1Pre Out 1Gate

doepferSystem A - 100VC-Mixer A-13511. IntroductionModule A-135 (VC-Mixer) is a four-channel voltagecontrolled mixer, which is used to mix audio si

A-135 VC-MixerSystem A - 100doepfer22. VC-Mix - OverviewControls:1 Audio In : Attenuator for audio si-gnal at input !2 Gain : Control for amplifi

doepferSystem A - 100VC-Mixer A-13533. Controls1 Audio InThe four attenuators 1 control the levels of the audioinputs. Adjust these controls to the

A-135 VC-MixerSystem A - 100doepfer4Fig. 2: Resulting amplification with bipolar controlvoltage (CV) and different gain settings3 ext. CVThis attenu

doepferSystem A - 100VC-Mixer A-13555. User examplesModule A-135 enables voltage controlled mixing ofup to 4 audio sources with 4 different control

A-135 VC-MixerSystem A - 100doepfer66. Patch-SheetThe following diagrams of the module can help yourecall your own Patches. They’re designed so tha

doepferSystem A - 100Distortion / Waveshaper A-13611. IntroductionModule A-136 is a distortion and waveshaping mo-dule with extensive control possi

doepferSystem A - 100 9. Appendix299.1 Adding a 5V power supplySome A-100 modules, for instance the A-113, A-190-1or A-191, need an extra 5 V power

A-136 Distortion / WaveshaperSystem A - 100doepfer22. DIS - OverviewControls:1 A : Amplification control for original signal2 + L : Clipping cont

doepferSystem A - 100Distortion / Waveshaper A-13633. Controls1 AControl 1 defines the amplification A of the originalsignal. The range of the amp

A-136 Distortion / WaveshaperSystem A - 100doepfer4H When an external control voltage is patchedto the normalled socket " (or § respectively)c

doepferSystem A - 100Distortion / Waveshaper A-13655. User ExamplesDifferent settings of the 5 parameters enable a lot ofvery complex and extreme w

A-136 Distortion / WaveshaperSystem A - 100doepfer66. Patch-SheetThe following diagrams of the module can helpyou recall your own Patches. They’re

doepferSystem A - 100Waveform Multiplier A-13711. IntroductionModule A-137 is a Voltage Controlled Waveform Mul-tiplier. The basic idea of a wave m

A-137 Waveform Multiplier System A - 100doepfer22. Basic principlesThe signal is processed by a standard linear VCA and 4so-called wave folding

doepferSystem A - 100Waveform Multiplier A-1373As the amplification resp. the Multiples parameter in-creases even the peaks of the folded signal rea

A-137 Waveform Multiplier System A - 100doepfer4Controls:1a CV Multiples: Attenuator for CV input !1b Man. Multiples: Manual Multiples control2a

doepferSystem A - 100Waveform Multiplier A-13754. Controls1a CVM (knob) / ! CVM (socket)1b Manual Multiples (knob)This group of elements is respons

9. Appendix System A - 100doepfer30Fig. 10: NT5 power supply connectionsGND(black)+5 V(red)to theconnectors ofthe bus boardfrom mainsinletblueblack

A-137 Waveform Multiplier System A - 100doepfer6& Out (socket)This is the audio output of the module. The output signalcan be processed by ot

doepferSystem A - 100MIXER A-13811. IntroductionModule A-138 (MIXER) is a four channel mixer, whichcan be used with either control voltages or audi

A-138 MIXERSystem A - 100doepfer22. MIXER - OverviewControls and markings:1 lin. / exp.: indication of type of mixer:A-138 a: linear potentiometers

doepferSystem A - 100MIXER A-13833. Controls and markings1 lin. / exp.Check which little circle is filled in, to see which version,linear or expone

A-138 MIXERSystem A - 100doepfer45. User examplesMixing audio signalsD Use A-138 b, and patch the audio signals to bemixed into sockets ! to $.D

doepferSystem A - 100Polarizing Mixer A-138c11. IntroductionModule A-138c is a four channel mixer, that allows toadd or subtract four incoming volt

A-138c Polarizing Mixer System A - 100doepfer2Controls:1...4 In1 ... In4 polarizing control input 1 ...45 Out polarizing control outputInputs / O

doepferSystem A - 100Polarizing Mixer A-138c33. Controls / Inputs / Outputs1...4 In1 ... In4 (controls)!...$ Input 1 ... Input 4 (sockets)These are

A-138c Polarizing Mixer System A - 100doepfer4The way of negative/positive control with zero positionin the center of the rotating angle will be

doepferSystem A - 100Polarizing Mixer A-138c54. User Examplesnot yet ready• general CV input expander (for each CV input)with polarizer function•

doepferSystem A - 100 9. Appendix31A The yellow/green wire is the safety (earth)connection, and must be never replaced bya different colour.If you’v

A-138c Polarizing Mixer System A - 100doepfer6

doepferSystem A - 100ADSR A-14011. IntroductionModule A-140 (ADSR) is an envelope generator,and, since it puts out control voltages, counts as one

A-140 ADSRSystem A - 100doepfer22. ADSR overviewControls:1 A: Attack time control2 D: Decay time control3 S: Sustain level control4 R: Release

doepferSystem A - 100ADSR A-14033. ControlsThe ADSR puts out a varying voltage, called an enve-lope, whenever a gate signal is sensed (see Fig. 1).

A-140 ADSRSystem A - 100doepfer45 ADSR ControlLED 5 gives a visual indication of the envelope voltageat the output.6 Time RangeThis 3-position rotar

doepferSystem A - 100ADSR A-1405" Retrig.Socket " is the ADSR’s retrigger input, which can beconnected, for instance, to the output from a

A-140 ADSRSystem A - 100doepfer65. User examplesThe envelope generated by the ADSR can be used formost kinds of modulation:• ADSR - VCAModulation

doepferSystem A - 100VCADSR A-14111. IntroductionModule A-141 (VCADSR) is a voltage controlledenvelope generator.Whenever a gate signal is sensed

A-141 VCADSRSystem A - 100doepfer22. VCADSR - OverviewControls and indicators:1 A : Attack time control2 D : Decay time control3 S : Sustain l

doepferSystem A - 100VCADSR A-14133. Controls and indicatorsAs soon as a gate signal is sensed at the VCADSRgate input 5, the VCADSR puts out a var

Contents System A - 100doepferivContentsImportant safety notes ... iiContents ...

9. Appendix System A - 100doepfer32The fins of the heat sink should be facing tothe right.It’s vital to make certain that the 16-wayplug and socket

A-141 VCADSRSystem A - 100doepfer45 CV A ... 8 CV RAttenuators 5 to 8 set the level of voltage controlfor inputs ! to $.9 LEDThe LED indica

doepferSystem A - 100VCADSR A-14155. User examplesBasically, the envelope generated by the VCADSRcan be used for any number of types of modulation:

A-141 VCADSRSystem A - 100doepfer6Fig. 3: Controlling release timeThe same basic system can be used, eg, to shortenthe attack phase the higher the

doepferSystem A - 100Voltage Contr. Decay / Gate A-14211. IntroductionModule A-142 (VCD) is a dedicated envelope gene-rator with just one paramete

A-142 Voltage Contr. Decay / GateSystem A - 100doepfer22. OverviewIndicators and controls:1 Decay : Manual control for altering the decaytime.2 C

doepferSystem A - 100Voltage Contr. Decay / Gate A-14233. Controls and indicators1 DecayThis is used for manual control of the decay time tD ofthe e

A-142 Voltage Contr. Decay / GateSystem A - 100doepfer44. In- / Outputs! Trig. InSocket ! is where the trigger signal is patched in." CVContro

doepferSystem A - 100Voltage Contr. Decay / Gate A-1425random length. An interesting variation on this themeis to patch the output into a filter CV

A-142 Voltage Contr. Decay / GateSystem A - 100doepfer6fig. 4: voltage-controlled trigger delayThis sort of patch for delaying a trigger signal is

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Quad AD/LFO A-143-11Fig. 1: A-143-1 Controls, Inputs and Outputs1. IntroductionModule A-143-1 contains four

doepferSystem A - 100 9. Appendix339.3. Using the mini power supply/bus9.3.1. IntroductionThe A-100 MNT (Mini power supply / bus) is compo-sed of a

Quad AD/LFO A-143-1 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER22. Basic PrinciplesFig. 2 shows the basic function of each unit:Fig. 2: Basic functionTh

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Quad AD/LFO A-143-13Provided that the trigger inputs are not patched the fourunits are daisy chained via the

Quad AD/LFO A-143-1 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER43. OverviewFig. 5: A-143-1 front panel1! §$!"2 3 4 5%76

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Quad AD/LFO A-143-15Controls:1AD/LFO : mode switch2 Attack: attack control (rising slope)3 Decay: decay cont

Quad AD/LFO A-143-1 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER63. Controls, Inputs and Outputs! Trig. In : trigger inputSocket ! is the trigger input o

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Quad AD/LFO A-143-174 Mix Polarizer: polarizer controlThis control is used to add or subtract the envelope s

Quad AD/LFO A-143-1 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER84. User ExamplesThe A-143-1 is suitable for all kinds of modulations wherenormally LFOs

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Quad ADSR A-143-21Fig. 1: A-143-2 Controls, Inputs and Outputs1. IntroductionModule A-143-2 contains four i

Quad ADSR A-143-2 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER22. Basic PrinciplesFig. 2 shows the basic function of each unit:Fig. 2: Basic functionThe

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Quad ADSR A-143-233. OverviewFig. 5: A-143-2 front panel1!2345&6$%"§

9. Appendix System A - 100doepfer349.3.2. A-100 MNT - OverviewControls:1 LED : LED indicator for +12 V supply.2 LED : LED indicator for -12 V su

Quad ADSR A-143-2 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER4Controls:1Range : range switch low – high – medium2 Attack : attack control3 Decay : decay

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Quad ADSR A-143-253. Controls, Inputs and Outputs! G : gate input$ Rt : retrigger inputSocket ! is the ADSR’

Quad ADSR A-143-2 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER64. User ExamplesThe A-143-2 is suitable for all kinds of modulations whereenvelope generat

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Quad LFO A-143-31Fig. 1: A-143-3 Controls and Outputs1. IntroductionModule A-143-3 Quad LFO is a low-cost f

Quad LFO A-143-3 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER22. OverviewFig. 2: A-143-3 front panelControls:1 Frequ. : frequency control2 Range: frequen

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Quad LFO A-143-333. Controls and Outputs1 FrequencyThis control adjusts the frequency of the LFO within the

Quad LFO A-143-3 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER44. User ExamplesAn LFO can be used for all sorts of different modulations:• VCO Pitch/Freq

doepferSystem A - 100Morphing Controller A-14411. IntroductionModule A-144 is an extension module for the VoltageControlled Mixer A-135. It is a so

A-144 Morphing ControllerSystem A - 100doepfer22. OverviewControls:1 CV : Attenuator for the control voltage atinput !2 Man. Morph : Manual morph

doepferSystem A - 100Morphing Controller A-14433. Controls1 CVUse attenuator 1 to adjust the level of the controlvoltage at CV input ! affecting th

doepferSystem A - 100 9. Appendix359.3.3. Controls / indicators1 LED • 2 LEDLEDs 1 and 2 indicate that the power supply isworking properly. Once

A-144 Morphing ControllerSystem A - 100doepfer44. In- / Outputs! CV InThe external control voltage is fed into the CV input!." Out 1 • .

doepferSystem A - 100Morphing Controller A-1445Different control voltage sources lead to interestingmorphing effects:Automatic morphing ca be realiz

A-144 Morphing ControllerSystem A - 100doepfer66. Patch-SheetThe following diagrams of the module can help yourecall your own Patches. They’re desig

doepferSystem A - 100LFO A-14511. IntroductionModule A-145 (LFO) is a low frequency oscillator,which produces cyclical control voltages in a very w

A-145 LFOSystem A - 100doepfer22. OverviewControls and indicators1 LED: frequency indicator for the sawtoothwave at output "2 LED: frequency

doepferSystem A - 100LFO A-14533. Controls and indicators1 LED ... 2 LED LEDs 1 and 2 show the frequency of the voltageoutput at sockets "

A-145 LFOSystem A - 100doepfer4& Reset InLFO synchronisation is possible, by sending a triggersignal (eg. a gate) to the reset input. Every tim

doepferSystem A - 100LFO A-14555. User examplesAn LFO can be used for all sorts of different modulati-ons:• LFO - VCA (A-130, A-131, A-132)Modulat

A-145 LFOSystem A - 100doepfer66. Patch-SheetThe following diagrams of the module can helpyou recall your own Patches. They’re designed sothat a co

doepferSystem A - 100LFO 2 A-14611. IntroductionModule A-146 (LFO 2) is a Low Frequency Oscilla-tor, which produces periodic control voltages over

9. Appendix System A - 100doepfer36Fig. 1: Connecting the ribbon cable to the moduleD Now join the free end of the ribbon cable (see 2 inFig. 2) to t

A-146 LFO 2System A - 100doepfer22. OverviewControls and indicators:1 Frequ. : frequency control2 Frequ. Range : switch for selecting frequency r

doepferSystem A - 100LFO 2 A-14633. Controls and indicators1 Frequ.Use this control to set the LFO’s frequency, within therange set by 4.2 Frequ. R

A-146 LFO 2System A - 100doepfer45. User examplesThe LFO can be used for all sorts of modulation:• LFO - VCAModulation of the amplifier produces pe

doepferSystem A - 100LFO 2 A-1465• Variable pulse widthIn using the square wave for AM or FM in the audiorange, it’s possible to control the timbre

A-146 LFO 2System A - 100doepfer6With the normal positive/negative square wave mo-dulating the pitch, the result is notes that are annoyin-gly out

doepferSystem A - 100VCLFO A-14711. IntroductionModule A-147 (VCLFO) is a voltage controlled lowfrequency oscillator, which can produce cyclical co

A-147 VCLFOSystem A - 100doepfer22. OverviewControls and indicators:1 Frequ. : Manual frequency control2 CV : Attenuator for the voltage at input

doepferSystem A - 100VCLFO A-14733. Controls and indicators1 Frequ.This control sets the frequency of the VCLFO in arange from 0.01 Hz (one cycle e

A-147 VCLFOSystem A - 100doepfer4Fig. 1: How sync affects the waveforms$ This socket outputs a sine wave (amplitude rangeroughly ± 5 V), whose freq

doepferSystem A - 100VCLFO A-14755. User examplesAn LFO can be used for all sorts of different modulati-ons:• VCLFO - VCAModulation of the VCA gai

doepferSystem A - 100Vactrol Multitype Filter A-101-111. IntroductionModule A-101-1 is a special multitype filter based onan idea by Nyle A. Steine

A-147 VCLFOSystem A - 100doepfer6Fig. 2: Simulation of string vibratoIntegrating the VCLFO into a MIDI systemUnlike the A-145 and A-146 LFOs, the A

doepferSystem A - 100Dual S&H A-14811. IntroductionModule A-148 (Dual S&H) has two identical sample &hold modules, designed to produce

A-148 Dual S&HSystem A - 100doepfer22. OverviewIndicators:1 LEDs: sampled voltage status indicatorsIn / Outputs:! Trig In : Input for trigger

doepferSystem A - 100Dual S&H A-14833. Indicators1 LEDsThese LEDs give a visual indication of the voltagelevel of the sampled and held signal (

A-148 Dual S&HSystem A - 100doepfer45. User examplesRandom arpeggiosIn the example in Fig. 2, an A-118 is used in conjunc-tion with the A-148 t

doepferSystem A - 100Dual S&H A-1485Abb. 3: GlissandoP If you like you can patch the gate signal tothe reset input of the LFO, so that its wa-v

A-148 Dual S&HSystem A - 100doepfer6Random filter settings per noteWith the patch in Fig. 4, every time a keyboard gatevoltage is received, a n

doepferSystem A - 100RCV A-149 /111. IntroductionModule A-149-1 is a Random Control VoltageSource based on the idea of Don Buchla's "So

A-149 /1 RCVSystem A - 100doepfer22. OverviewControls and Indicators:1 Man N : manual control of “N”2 CV N : attenuator for CVN at input !3, 4

doepferSystem A - 100RCV A-149 /133. Controls3.1 Quantized Random Voltages1 Man NThis is the manual control for the integer number N inthe range 1

A-101-1 Vactrol Multitype Filter System A - 100doepfer2Controls:1 Frequency manual frequency control2 CVF2 attenuator for FCV input "3 CVF3

A-149 /1 RCVSystem A - 100doepfer4Fig.1: Probability distribution for different settings of "D"H The final value of D is the sum of the

doepferSystem A - 100RCV A-149 /154.2 Stored Random Voltages% CV D InThis socket is the Control Voltage input for theprobability distribution "

A-149 /1 RCVSystem A - 100doepfer6tempo of the VCLFO A-147. Thus as the range of pitchselection increases the number of possible spectralranges bec

doepferSystem A - 100Digital Random A-149-211. IntroductionA-149-2 is an extension module for the random voltagegenerator A-149-1. It makes availab

A-149-2 Digital Random System A - 100doepfer2Controls:1... 8 (LEDs): Display for each outputOutputs:! ... ( (sockets): Digital outputs2. Overvi

doepferSystem A - 100Digital Random A-149-233. Controls1...8 (LEDs) / !...( (sockets)At the sockets !...( the 8 random digital outputs areavailable

A-149-2 Digital Random System A - 100doepfer4Appendix: Connection A-149-1 – A-149-2Module A-149-2 (Digital Random Voltages) is deliveredwith two

doepferSystem A - 100Dual VCS A-15011. IntroductionModule A-150 (Dual VCS) contains two separatevoltage-controlled switches.Each switch has a cont

A-150 Dual VCSSystem A - 100doepfer22. OverviewIndicators:1 LED: indicator for in / output "2 LED: indicator for in / output §In / Outputs:!

doepferSystem A - 100Dual VCS A-15033. Indicators1 LED ... 2 LEDLEDs 1 and 2 serve as status indicators, to showwhich of the two in / outputs &

doepferSystem A - 100Vactrol Multitype Filter A-101-133. Controls / Inputs / Outputs1 Frequency (control) / ! CVF In 1 (socket)2 CVF2 (control) / &

A-150 Dual VCSSystem A - 100doepfer4H The switches are bi-directional: that is, twoinputs can be connected to one output, and viceversa. The particu

doepferSystem A - 100Dual VCS A-1505Switching between modulation sourcesIn the example in Fig. 3, the A-150 switches betweentwo filter cut-off modul

A-150 Dual VCSSystem A - 100doepfer6

doepferSystem A - 100Quad Sequential Switch A-15111. IntroductionModule A-151 (Quad Sequential Switch) is like anelectronic four-position rotary s

A-151 Quad Sequential SwitchSystem A - 100doepfer22. OverviewIndicators:1 LED: Indicator for in / output $2 LED: Indicator for in / output %3 LE

doepferSystem A - 100Quad Sequential Switch A-15133. Indicators1 LED • 2 LED • 3 LED • 4 LEDLEDs 1 to 4 are the status indicators, s

A-151 Quad Sequential SwitchSystem A - 100doepfer4Fig. 1: How the A-151 switching works ( : in / output connected)H The switches are bi-directional

doepferSystem A - 100Quad Sequential Switch A-15155. User examplesSwitching VCO waveformsIn the example in Fig. 2, every time a trigger pulse hitst

A-151 Quad Sequential SwitchSystem A - 100doepfer6Fig. 3: Four-step tone sequencingP If you use a keyboard gate as the triggerinstead of the LFO,

doepferSystem A - 100Voltage Addressed T&H/Switch A-15211. IntroductionModule A152 is a useful switching and Track&Hold mo-dule. It combines

A-101-1 Vactrol Multitype Filter System A - 100doepfer4Resonance can be increased up to self-oscillation . Butdue to the va

Voltage Addressed T&H/Switch A-152 System A - 100doepfer22. Basic principlesThe sum of the voltages coming from the manualaddress control and

doepferSystem A - 100Voltage Addressed T&H/Switch A-1523Controls:1 Address manual address control2 CV attenuator for address CV input $3 1...8 LE

Voltage Addressed T&H/Switch A-152 System A - 100doepfer43. Controls / Inputs / Outputs1 Address (control)2 CV (control) / $ CV In (socket)This

doepferSystem A - 100Voltage Addressed T&H/Switch A-1525common socket may even function as input. In this casethe signal applied to the common so

Voltage Addressed T&H/Switch A-152 System A - 100doepfer6Normalling optionsThe common terminals of the multiplexer and the T&Hsection can be

doepferSystem A - 100Voltage Addressed T&H/Switch A-15275. User ExamplesGraphic VCOThe right picture shows the principle patch for a so-called gr

Voltage Addressed T&H/Switch A-152 System A - 100doepfer8For the last 3 examples the waveform changes more orless accidentally. If the A-149-1 r

doepferSystem A - 100Voltage Addressed T&H/Switch A-1529trigger the advance to the next address of the A-152.The trigger delay connected between

Voltage Addressed T&H/Switch A-152 System A - 100doepfer107-fold Manual Ribbon GateThe right picture shows an application of the A-152 incombina

doepferSystem A - 100Sequencer Controller A-15411. IntroductionModule A-154 is a supplement to the Analog/TriggerSequencer A-155. It offers a lot o

doepferSystem A - 100Vactrol Multitype Filter A-101-15Pay attention that the notch filter does not arise from acombination of low pass and high pass

A-154 Sequencer Controller System A - 100doepfer2Fig.1: Overall view

doepferSystem A - 100Sequencer Controller A-15432. Basic principlesThe current step position of the A-155 is determinedby the current address of th

A-154 Sequencer Controller System A - 100doepfer43. Overview!1b1a"2b2a§3b3a$4b4a%5b5a&a6a7a&b6b/&c6c&d6d9(81c)7b

doepferSystem A - 100Sequencer Controller A-1545Controls:1a Manual Mode: Manual Mode control1b Mode CV: Attenuator for CV input !1c Mode display (6

A-154 Sequencer Controller System A - 100doepfer64. Controls1a Manual Mode (knob)/ 1c Anzeige (LEDs)! Mode CV (socket) / 1b Mode CV (knob)Contro

doepferSystem A - 100Sequencer Controller A-15472a Manual First (knob)2b First CV (knob) / " First CV (socket)3a Manual Last (Regler)3b Last CV

A-154 Sequencer Controller System A - 100doepfer8Another example is to control the clock rate by one ofthe A-155 CV outputs. This leads to a diff

doepferSystem A - 100Sequencer Controller A-1549Operating the reset button prepares the sequencer tojump to the first step as soon as the next clock

A-154 Sequencer Controller System A - 100doepfer10Fig. 2 shows how to patch the upper trigger rows and theupper CV rows of two A-155 with A-154 a

doepferSystem A - 100Sequencer Controller A-15411The position of switch 7a determines if the A-154 mana-ges 8 or 16 steps. Only in position "16

About this manualThis user manual describes the A-100 modular synthe-sizer system, and explains how to use each section ofit.If this is your first tim

A-101-1 Vactrol Multitype Filter System A - 100doepfer64. User Examplesnot yet ready• examples with different audio signals (e.g. 3parallel VCOs

A-154 Sequencer Controller System A - 100doepfer125. User Examplesnot yet ready

doepferSystem A - 100Sequencer Controller A-15413Appendix: Connection A-154 – A-155(1) Disconnect the 10 pin ribbon cable leading from the connector

A-154 Sequencer Controller System A - 100doepfer14Two 10 pin ribbon cables come from the A-154. One (A) with a 10 pin female connector (A1) at it

doepferSystem A - 100Sequencer Controller A-15415(4) Connect B1 with the female connector at the end of the ribbon cable that was removed from ST2 o

A-154 Sequencer Controller System A - 100doepfer16In case that two A-155 have to be controlled by the A-154 the second A-155 ha

doepferSystem A - 100Analog / Trigger Sequencer A-15511. IntroductionModule A-155 (Analog / Trigger Sequencer) is a com-bined 8-step analog and tr

A-155 Analog / Trigger SequencerSystem A - 100doepfer22. Overview01001010100102010010301001040100105010010601001070100108010010010RangeGlideScale G

doepferSystem A - 100Analog / Trigger Sequencer A-1553Controls1 Switches : these select triggers and/or gates foreach step2 LEDs : indicators to s

A-155 Analog / Trigger SequencerSystem A - 100doepfer43. Controls1 SwitchesThe three-position toggle switches 1 are used toselect whether a particu

doepferSystem A - 100Analog / Trigger Sequencer A-15554 CV knobs (upper row)You use the CV knobs 4 (upper row) to set thevoltage output for each ste

doepferSystem A - 100Vactrol Lowpass Gate A-101-211. IntroductionModule A-101-2 is a vactrol based combination ofLow Pass filter (LP) and VCA. Addi

A-155 Analog / Trigger SequencerSystem A - 100doepfer6a speed determined by the Glide control knob (fig. 2).If you patch the output from the Gate ro

doepferSystem A - 100Analog / Trigger Sequencer A-15574. In / Outputs! Trigger OutputsSockets ! are the outputs from the three trigger rowsand the

A-155 Analog / Trigger SequencerSystem A - 100doepfer8• Glide Ctrl. : The glide function is active wheneverthe control signal input here is “low”.H

doepferSystem A - 100Analog / Trigger Sequencer A-1559Trigger row 1 (steps 1, 2, 3 and 5 selected) picks outthe accented notes, by triggering an A

A-155 Analog / Trigger SequencerSystem A - 100doepfer10fig. 3: standard patch with VCO, VCF and glide control1 23 45 678VCOClockTrig. 1VCAVCFADSRTri

doepferSystem A - 100Analog / Trigger Sequencer A-15511fig. 4: controlling decay time in a VC-ADSRIn fig. 4 the lower analog CV row controls the de

A-155 Analog / Trigger SequencerSystem A - 100doepfer12fig. 5: controlling accents / dynamicsWith the patch in fig. 5 you can create variable dyna-m

doepferSystem A - 100Analog / Trigger Sequencer A-15513fig. 6: 16-step sequence with single analog CVs1 2 3 4 5 6 7 8ClockTrig. 1Post Out 2A-160Tri

A-155 Analog / Trigger SequencerSystem A - 100doepfer14The following are some short notes with suggestionsfor further exploration, to act as inspira

doepfer System A - 100 Quantizer A-15611. IntroductionModule A-156 (QNT) is a dual control voltage quan-tizer.For each of the two sections, the con

A-101-2 Vactrol Lowpass Gate System A - 100doepfer2Controls:1 F/A manual frequency/loudness control2 CV2 attenuator for CV input "3 Level at

A-156 Quantizer System A - 100 doepfer22. OverviewControls:1 switch : 3-position switch for scale type(chromatic, major, minor)2 switch : 3-posit

doepfer System A - 100 Quantizer A-15633. Basic PrinciplesA quantizer consists of an analog/digital converter(ADC) and a digital/analog converter (D

A-156 Quantizer System A - 100 doepfer44. Controls1 SwitchThe 3-position switch 1 determines the scale type.In position "All" a chromatic

doepfer System A - 100 Quantizer A-1565In the “Quint" position only voltages corresponding tothe fundamental or the fifth are passed to the con

A-156 Quantizer System A - 100 doepfer65. In / Outputs! CV In • % CV InSocket ! and % are the inputs for the quantizers 1and 2 respect

doepfer System A - 100 Quantizer A-1567$ Trig. Out • ( Trig. OutAt the trigger outputs $ and ( a trigger pulse ofabout 10ms duration i

A-156 Quantizer System A - 100 doepfer86. User examplesThere are manifold applications for the A-156 as anycontrol voltage can be used as a voltage

doepfer System A - 100 Quantizer A-1569fig 7: arpeggio-like sound patternsVCO VCFA-160/ 16GateA-156QNTCV InCV OutTrig. InTrig. OutTranspose CV 1+2Op

A-156 Quantizer System A - 100 doepfer10If an ADSR is used as a control voltage source theA-129/3 is no longer required as the ADSR generatesonly po

doepfer System A - 100 Quantizer A-15611fig. 8: Sequencer and quantizer1 2 3 4 5 6 7 8VCOClockTrig. 1Pre Out 2VCFVC-ADSRDecayA-1551 2 345 6 7 8Trig.

doepferSystem A - 100Vactrol Lowpass Gate A-101-233. Controls / Inputs / Outputs1 F/A (control) / ! CV In 1 (socket)2 CV2 (control) / " CV In

A-156 Quantizer System A - 100 doepfer127. Patch-SheetThe following diagrams of the module can help yourecall your own Patches. They’re designed so

doepferSystem A - 100Clock Divider A-16011. IntroductionModule A-160 (Clock Divider) is a frequency dividerfor clock signals, designed to be a sourc

A-160 Clock DividerSystem A - 100doepfer22. OverviewIndicators:1 LED : Clock / 2 indicator2 LED : Clock / 4 indicator3 LED : Clock / 8 indicator

doepferSystem A - 100Clock Divider A-16033. Indicators1 LED ... 6 LEDLEDs 1 to 6 indicate the status of each of the sub-divided frequencies at o

A-160 Clock DividerSystem A - 100doepfer4Fig. 1: Ping-Pong effectFig. 2: ADSR envelope with retriggeringP By using different outputs on the A-160

doepferSystem A - 100Clock Sequencer A-16111. IntroductionModule A-161 is an eight-step Clock Sequencerwhich is internally connected to the Clock

A-161 Clock SequencerSystem A - 100doepfer22. OverviewIndicators:1 LED ... 8 LED : Status indicators for each outputOutputs:! 1 ... ( 8 : Outp

doepferSystem A - 100Clock Sequencer A-16133. Indicators1 LED ... 8 LEDLEDs 1 to 8 are the status indicators for outputs ! to(.4. Outputs! 1 .

A-161 Clock SequencerSystem A - 100doepfer45. User examples"Rhythmatising" notesIn the example in Fig. 2 (see next page) notes playedon t

doepferSystem A - 100Clock Sequencer A-1615Abb. 2: "Rhythmatising” notesP Instead of an LFO, you can also use MIDI-clock signals from a MIDI/CV

A-101-2 Vactrol Lowpass Gate System A - 100doepfer44 Resonance (control)In low pass mode this is the resonance control. Theresonance function &q

A-161 Clock SequencerSystem A - 100doepfer6Creating complex envelopesA small modification to the previous patch is shown inFig. 3. Here, the Clock

doepferSystem A - 100Clock Sequencer A-1617Different envelopes with each note playedWith the patch in Fig. 4, every time a new note isplayed, a diff

A-161 Clock SequencerSystem A - 100doepfer8Mini analog sequencerThe patch in Fig. 5 produces a four-step mini analogsequencer.A clock signal either

doepferSystem A - 100Dual Trigger Delay A-16211. IntroductionModule A-162 (Dual Trigger Delay) contains twoseparate delay circuits for trigger sig

A-162 Dual Trigger DelaySystem A - 100doepfer22. OverviewControls and indicators:For each trigger delay:1 Del. : Delay control2 Len. : Trigger le

doepferSystem A - 100Dual Trigger Delay A-16233. Controls and indicators1 Del.This control sets the trigger delay time tD (see Fig. 1)in a range fr

A-162 Dual Trigger DelaySystem A - 100doepfer45. User examplesModulation delayThe A-162 is particularly useful for delaying the onsetof modulation,

doepferSystem A - 100VC Frequency Divider A-16311. IntroductionModule A-163 is a voltage controlled audio fre-quency divider.The frequency of the

A-163 VC Frequency DividerSystem A - 100doepfer22. OverviewControls:1 Manual: Control for manual setting of the integerdividing factor N2 CV : Sy

doepferSystem A - 100VC Frequency Divider A-16333. Controls1 ManualWith knob 1 the divisor N is manually adjusted.Integer division of an audio freq

doepferSystem A - 100Vactrol Lowpass Gate A-101-254. User Examplesnot yet ready

A-163 VC Frequency DividerSystem A - 100doepfer44. In- / Outputs! CV InThe external control voltage (e.g. from an LFO orADSR) used to modulate the

doepferSystem A - 100VC Frequency Divider A-1635In fig. 1 the triangle signal of a LFO (e.g. A-145) isused to control the divisor N of the A-163. As

A-163 VC Frequency DividerSystem A - 100doepfer66. Patch-SheetThe following diagrams of the module can help yourecall your own Patches. They’re des

doepferSystem A - 100Dual Trigger Modifier A-16511. IntroductionModule A-165 (Dual Trigger Modifier) contains twoseparate trigger modifiers, to use

A-165 Dual Trigger ModifierSystem A - 100doepfer22. OverviewIndicators1 LED : Status indicator for the inverted trig-ger signal at output §2 LED :

doepferSystem A - 100Dual Trigger Modifier A-16533. Indicators1 LEDThis LED is the status indicator for the invertedtrigger signal at output §.2 LE

A-165 Dual Trigger ModifierSystem A - 100doepfer45. User examplesRepeating notes played on keyboardIn the patch in Fig. 2 each note played on the k

doepferSystem A - 100LOGIC A-16611. IntroductionModule A-166 is a dual logic device to combine digi-tal control signals.It contains 2 identical uni

A-166 LOGICSystem A - 100doepfer22. LOGIC - OverviewControls:1 LED : Display of the logical state for thecorresponding outputIn / Outputs:! (Inpu

doepferSystem A - 100LOGIC A-16633. Controls1 LEDsThe LEDs display the logical state of the correspon-ding output (on = logical “1” / high, off = l

A-101-2 Vactrol Lowpass Gate System A - 100doepfer6

A-166 LOGICSystem A - 100doepfer4" AND • OR • XORThese are the output sockets for the three logicalfunctions. The output of each state depe

doepferSystem A - 100LOGIC A-1665Fig. 1: Patch for generation of rhythmicclock signalsA-16112345678OutA-160/ 2/ 4/ 8/ 16/ 32/ 64Trig.InA-166Clock I

A-166 LOGICSystem A - 100doepfer66. Patch-SheetThe following diagrams of the module can helpyou recall your own Patches. They’re designed sothat a

doepferSystem A - 100CMP A-16711. IntroductionModule A-167 compares analog voltages and deri-ves a gate signal. The state of the gate output (low/

A-167 CMPSystem A - 100doepfer22. OverviewControls:1 + IN : Attenuator for voltage at input !2 - IN : Attenuator for voltage at input "3

doepferSystem A - 100CMP A-16733. Basic principleThe module generates internally the voltage USUM:USUM = a1 • In+ - a2 • In- + OffsetThe factors a

A-167 CMPSystem A - 100doepfer44. Controls1 + In • 2 - InThe controls 1 and 2 are the attenuators for thevoltages fed to the sockets ! r

doepferSystem A - 100CMP A-16755. In - / Outputs! + INThe input signal fed into this socket is attenuated withcontrol 1 and added to the internal

A-167 CMPSystem A - 100doepfer6The module can even be used to add the free-runningmode to each ADSR (e.g. A-140 or A-141) similar to aLFO but with

doepferSystem A - 100Dual Slew Limiter A-17011. IntroductionModule A-170 (Dual Slew Limiter) contains two sepa-rate slew limiters, also known as po

doepferSystem A - 100Modular Vactrol Phaser A-101-311. IntroductionModule A-101-3 is a 12 stage phase shifter with vac-trols as phase shifting ele

A-170 Dual Slew LimiterSystem A - 100doepfer22. OverviewControls and indicators:1 Time : rise / fall time control (input 1)2, 6 - LED : negative

doepferSystem A - 100Dual Slew Limiter A-17033. Controls and indicators1 TimeThis control sets the rise / fall time tC of slew limiter 1(see Fig. 1

A-170 Dual Slew LimiterSystem A - 100doepfer44. In /Outputs! In • § InSockets ! (upper SL) and § (lower SL) are the slewlimiters’ inputs. P

doepferSystem A - 100Dual Slew Limiter A-1705Slew limiter as AR envelope generatorYou can use the lower A-170 as a simple AR enve-lope generator, f

A-170 Dual Slew LimiterSystem A - 100doepfer6Creating complex envelopesA combination of the Clock Divider / Sequencer (A-160/161) and a number of A-

doepferSystem A - 100VC Slew Limiter A-17111. IntroductionModule A-171 is a voltage controlled slew limiter,otherwise known as a portamento contro

A-171 VC Slew LimiterSystem A - 100doepfer22. OverviewControls and indicators:1 Rate : control governing the transition speedof the modified signa

doepferSystem A - 100VC Slew Limiter A-17133. Controls and indicators1 RateWith this control you adjust the transition speed of theslope created by

A-171 VC Slew LimiterSystem A - 100doepfer44. In / Outputs! CV 1 • " CV 2The transition speed produced by the A-171 dependson a comb

doepferSystem A - 100VC Slew Limiter A-1715Slew Limiter as VC AR generatorYou can also use the A-171 as a simple AR genera-tor, for instance with

A-101-3 Modular Vactrol Phaser System A - 100doepfer2Fig.1: A-101-3 Overall view

A-171 VC Slew LimiterSystem A - 100doepfer6Producing complex controllable modulati-onsWith a combination of a Clock Divider / Sequencer(A-160 / A-16

doepferSystem A - 100VC Slew Limiter A-1717Fig. 5: Producing complex controllable modulations.A-171A-171Inpu t 1OutputA-138 aMIXERInpu t 2Input 4In

A-171 VC Slew LimiterSystem A - 100doepfer86. Patch-SheetThe following diagrams of the module can helpyou recall your own Patches. They’re designe

doepferSystem A - 100MAX / MIN A-17211. IntroductionModule A-172 is a Minimum/Maximum selector. Ithas available four analog inputs and two analogo

A-172 MAX / MINSystem A - 100doepfer22. OverviewControls and indicators:1 Max, Ctr. : monitoring LEDs for Maximumoutput2 Min. Ctr. : monitoring

doepferSystem A - 100MAX / MIN A-17233. Basic principlesThe module permanently picks the maximum resp.minimum voltage out of the four analog input

A-172 MAX / MINSystem A - 100doepfer45. In- / Outputs! In 1 ... $ In 4The input signals are connected to these sockets. Atleast 2 signals

doepferSystem A - 100Joy Stick A-17411. IntroductionModule A-174 (Joy Stick) outputs 2 control voltagesgenerated by a spring-loaded X/Y cross pot

A-174 Joy StickSystem A - 100doepfer2Controls:1 X Y : Joy Stick (cross potentiometer)2 Offs. : Offset control for Y control voltage3 LED’s :

doepferSystem A - 100Joy Stick A-17433. Controls1 X Y Joy StickWith the Joy Stick 1 the control voltages appearingat the CV outputs ! resp. "

doepferSystem A - 100Modular Vactrol Phaser A-101-332. Basic principlesThe module is made of two identical units that differonly in the normalling

A-174 Joy StickSystem A - 100doepfer44. In- / Outputs! CV YThis socket outputs the Y control voltage controlledby vertical movement of the joy

doepferSystem A - 100Joy Stick A-1745The patch in fig. 1 shows how a A-174 can be used tomove the position of an audio signal in the quadropho-nic

A-174 Joy StickSystem A - 100doepfer66. Patch-SheetThe following diagrams of the module can help yourecall your own Patches. They’re designed so

doepferSystem A - 100 Dual Voltage Inverter A-17511. IntroductionModule A-175 (Dual Voltage Inverter) is exactly whatit says it is: two identical in

A-175 Dual Voltage InverterSystem A - 100doepfer22. OverviewIndicators1 LEDs : Visual indicators of the state of theoutput voltage (positive or neg

doepferSystem A - 100 Dual Voltage Inverter A-17533. Indicators1 LEDsVisual indicators of the state of the output voltage(positive or negative) at

A-175 Dual Voltage InverterSystem A - 100doepfer45. User examplesPanningFig. 1 shows a typical patch to create Panning - theshifting of a sound’s

doepferSystem A - 100 Dual Voltage Inverter A-1755Fig. 2: Mirroring a series of notesAM with control of timbreThe example in Fig. 3 shows amplitud

A-175 Dual Voltage InverterSystem A - 100doepfer66. Patch-SheetThe following diagrams of the module can helpyou recall your own Patches. They’re d

doepferSystem A - 100Control Voltage Source A-17611. IntroductionModule A-176 (Control Voltage Source) providesthree voltage sources, to use wher

Introduction System A - 100doepferviIntroductionIn the A-100, Doepfer have strarted in 1994 a capableand versatile analog modular synthesizer, built

A-101-3 Modular Vactrol Phaser System A - 100doepfer4that no plug is inserted into this socket. To obtain aphaser with more or less stages the out

A-176 Control Voltage SourceSystem A - 100doepfer22. OverviewControls:1 CV 1 : Coarse control for the voltage atlinked outputs ! and "2 Fin

doepferSystem A - 100Control Voltage Source A-17633. Controls1 CV 1 • 3 CV 2Controls 1 and 3 provide coarse adjustment of thevoltages at o

A-176 Control Voltage SourceSystem A - 100doepfer45. User examplesExpanding other modules’ facilitiesModule A-176 is always going to be useful when

doepferSystem A - 100Control Voltage Source A-1765Fig. 2: Coarse and fine tuning an A-110 VCO.Recalling pre-set CV valuesCombined with an A-150 (o

A-176 Control Voltage SourceSystem A - 100doepfer66. Patch-SheetThe following diagrams of the module can helpyou recall your own Patches. They’re

doepferSystem A - 100Theremin A-17811. IntroductionModule A-178 (Theremin Voltage Source) producesa variable control voltage which gets bigger thec

A-178 ThereminSystem A - 100doepfer22. OverviewControls:1 Offset : control for setting the null (zero) point2 LEDs : LEDs to give a visual indicat

doepferSystem A - 100Theremin A-17833. Basic principlesThe theremin acts as one plate of a capacitor and ahuman body as the other plate. Moving th

A-178 ThereminSystem A - 100doepfer42 LEDsThe LEDs 2 indicate the state of the voltage at CVoutputs " and §.3 LEDLED 3 shows the presence of a

doepferSystem A - 100Theremin A-17856. User examplesTheremin module A-178 provides a further source ofcontrol for real-time sound manipulation and

doepferSystem A - 100Modular Vactrol Phaser A-101-353. Overview"§3! 1(/2$45&%6

A-178 ThereminSystem A - 100doepfer6fig. 2: Recommended positioning of two A-178sUsing the gate functionThe gate function in the A-178 gives you the

doepferSystem A - 100Theremin A-17877. Patch-SheetThe following diagrams of the module can help yourecall your own Patches. They’re designed so t

A-178 ThereminSystem A - 100doepfer88. AppendixOn the board a trimming inductor resp. trimmingpotentiometer is available with which the offset canb

doepferSystem A - 100MULTIPLES A-18011. IntroductionModule A-180 (MULTIPLES) is a multi-connector.It has eight inter-connected sockets, so that you

A-180 MULTIPLESSystem A - 100doepfer22. OverviewIn / Outputs! ... (: 8 interconnected socketsH By removing the internal solder link betweensocket

doepferSystem A - 100MULTIPLES 2 A-18111. IntroductionModule A-181 (MULTIPLES 2) is a double set ofmultiple sockets. Unlike module A-180, it tak

A-181 MULTIPLES 2System A - 100doepfer22. OverviewIn / Outputs!, ", § : three internally linked sockets, one ofwhich (!) is a 6.3 mm mono jack

doepferSystem A - 100Bus Access A-18511. IntroductionModule A-185 (Bus Access) enables the user to haveaccess to the internal system bus of the Sys

A-185 Bus AccessSystem A - 100doepfer22. OverviewControls:1 Contr. : system bus gate indicator LED2 Contr. : system bus CV indicator LEDIn / Outp

doepferSystem A - 100Bus Access A-18533. Controls1 Contr.LED indicator 1 shows the state of the gate signal onthe system bus.2 Contr.LED indicator

A-101-3 Modular Vactrol Phaser System A - 100doepfer6Controls:1 Level: attenuator for audio input !2 CV: attenuator for CV input "3 Shift: ma

A-185 Bus AccessSystem A - 100doepfer45. User examplesCreating a common system bus for anA-100 with more than one 6U rack systemIf your System A-10

doepferSystem A - 100Bus Access A-1855fig. 2: Connecting the system busses on a multiple-rack A-100 systemA-185BUS ACCESSGateInContr.CVInCVOutContr

A-185 Bus AccessSystem A - 100doepfer66. AppendixModule A-185 has two internal jumpers on its circuitboard, which are factory-set to send external

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-11Fig. 1: A-188-1 Controls and In/Outputs1. IntroductionModule A-188-1 is a so-called Bucke

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-122. Basic PrinciplesAs mentioned in the introduction a BBD circuit can beregarded as a cha

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-13The following table shows the relation between clock frequency, delay time and number of

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-14Fig. 3: A-188-1 module scheme

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-15Fig. 3 shows the internal details of the module A-188-1: theupper part is the actual BBD

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-16The following sketch shows the effect of normal/invertedmixing by means of a simple sawto

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-173. OverviewFig.5: A-188-1 front panelControls:1 Delay Clock : manual delay control2 CV2:

doepferSystem A - 100Modular Vactrol Phaser A-101-374. Controls! Audio In / 1 LevelSocket ! is the audio input with the assigned attenuator1. Feed

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-184. Controls and In- / Outputs4.1. High Speed VCO Section1 Delay Clock : manual delay cont

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-19Consequently for all clock patches from and to the A-188-1only short patch cables (~ 30 c

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-1104.2. BBD Section"Ext. Clk In: BBD clock inputThis is the clock input of the BBD sec

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-111The position of the polarity switch 9 defines if the normal orthe inverted BBD signal is

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-1125. User ExamplesStandard Flanger PatchSuitable control voltage sources are LFO (A-145 as

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-113"Enveloped" BBDControl voltage for the A-188-1 is generated by theenvelope of

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-114Clock FilterThe BBD audio output is filtered with a low pass (e.g. A-108). The frequency

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-115This patch shows another example for the Karplus/Strongsynthesis. The LFO A-145 is used

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-116

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-21Fig. 1: A-188-2 Controls and In/Outputs1. IntroductionModule A-188-2 based on a so-called

A-101-3 Modular Vactrol Phaser System A - 100doepfer8stages can be obtained. The output of stage 1 does notlead to a phaser but a high pass or low

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-222. Basic PrinciplesA BBD circuit can be regarded as a chain of Sample &Hold units (S&

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-23The following table shows the relation between clock frequency, used output stage (tap)

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-24Fig. 3: A-188-2 module scheme

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-25Fig. 3 shows the internal circuit details of the module: theupper part is the high speed

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-26Each tap is connected to two polarizers (the polarizerfunction is described on the last p

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-27The feedback can be increased up to self-oscillation. Incontrast to other feedbacks (e.g.

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-283. OverviewFig.5: A-188-2 front panel2a(=1a2b1b43§"!$)&65%/

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-29Controls:1a, 1b : mix levels/polarities of the BBD taps3328, 2790, 1726, 1194, 662 and 39

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-2104. Controls and In- / Outputs4.1. High Speed VCO Section3 Delay : manual delay/clock con

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-211= CV Out: CV output HSVCOThis CV output indicates the clock frequency at output §and is

doepferSystem A - 100Modular Vactrol Phaser A-101-39( Stage Out (6x)These are the outputs of the phase shifting stages.Applications of these outputs

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-212) Single OutputsThe six sockets ) are the "raw" outputs (taps) of the BBDstage

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-2135. User ExamplesStandard Modulation PatchSuitable control voltage sources are LFO (A-145

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-214Clock FilterThe BBD audio output is filtered by a low pass (e.g. A-108).The frequency of

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-215Voltage controlled output mixingFour of the single outputs of the A-188-2 are patched to

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 BBD Module A-188-216

doepferSystem A - 100MIDI-CV/SYNC Interface A-19011. IntroductionThe A-190 is a MIDI-CV/SYNC Interface, with whichyou can control any A-100 Module

A-190 MIDI-CV/SYNC InterfaceSystem A - 100doepfer22. OverviewControls and indicators1 Group : Button to select which menu section(out of the Confi

doepferSystem A - 100MIDI-CV/SYNC Interface A-1903In / Outputs! MIDI THRU : Output for relaying MIDI messagessent to MIDI IN to another MIDI unit.&

A-190 MIDI-CV/SYNC InterfaceSystem A - 100doepfer43. Starting to use the A-190Before switching your system on, use a MIDI cable toconnect between y

doepferSystem A - 100MIDI-CV/SYNC Interface A-19054.1 Using the A-190On power up, the A-190 defaults to Performancemode. This is the normal mode of

A-101-3 Modular Vactrol Phaser System A - 100doepfer10

A-190 MIDI-CV/SYNC InterfaceSystem A - 100doepfer6Pressing the Group button 1 switches to the othermenu group - the button acts as a toggle switch.

doepferSystem A - 100MIDI-CV/SYNC Interface A-1907Changing parametersThere are two ways of changing parameters on theA-190: either manually, or by s

A-190 MIDI-CV/SYNC InterfaceSystem A - 100doepfer84.2 CONFIG menusCHANNEL / REF. NOTEThe CHANNEL parameter sets the MIDI receivechannel. In perf

doepferSystem A - 100MIDI-CV/SYNC Interface A-1909CV CHAR.This parameter sets the voltage control characteri-stics of the pitch CV output from the

A-190 MIDI-CV/SYNC InterfaceSystem A - 100doepfer10CLOCK TIMEThis parameter sets the amount by which the MIDIclock is divided before being sent to t

doepferSystem A - 100MIDI-CV/SYNC Interface A-19011REF. OFFSETThis parameter sets the voltage offset for the bottomnote - and works in the same way

A-190 MIDI-CV/SYNC InterfaceSystem A - 100doepfer12RTRIG. TIMEThis parameter sets the gate retrigger time - ie. thetime that elapses before another

doepferSystem A - 100MIDI-CV/SYNC Interface A-19013ASSIGN CV2This parameter sets which MIDI message is sent toDAC 2, and thus to the CV2 output sock

A-190 MIDI-CV/SYNC interfaceSystem A - 100doepfer144.3 PERFORMANCE MenusCHANNELThe CHANNEL parameter sets the MIDI receivechannel. MIDI messages re

doepferSystem A - 100MIDI-CV/SYNC interface A-19015GLIDE TIMEThe Glide Time parameter controls the length of theportamento time in the A-190’s built

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Universal Vactrol Module A-101-91Fig. 1: A-101-9 Controls and In/Outputs1. IntroductionWe call the A-101-9 a

A-190 MIDI-CV/SYNC interfaceSystem A - 100doepfer16No function at presentReserved for future expansion (e.g. arpeggiator)BEND WIDTHThe BEND WIDTH pa

doepferSystem A - 100MIDI-CV/SYNC interface A-190174.4 Storing set-upsThe A-190 is equipped with a non-volatile memory(EEPROM - electrically erasea

A-190 MIDI-CV/SYNC interfaceSystem A - 100doepfer184.5 PERFORMANCE modeIn performance mode the A-190 converts incomingMIDI messages into CV and ga

doepferSystem A - 100MIDI-CV/SYNC interface A-19019CONTROLLER #68 (Legato)The retrigger function (see CONFIG menu 1) canalso be switched on and off

A-190 MIDI-CV/SYNC interfaceSystem A - 100doepfer204.6 Initialisation (Reset)When the A-190 is first switched on after leaving thefactory, its memo

doepferSystem A - 100MIDI-CV/SYNC interface A-19021Parameter Value NotesCHANNEL 0 MIDI channel 1REF. NOTE 36 C3CLOCK TIME 1 clock frequency at outpu

A-190 MIDI-CV/SYNC interfaceSystem A - 100doepfer22Controller Effect SettingCont 01 nModulationn = LFO voltage amount sent to CV 1Cont 05 nGlid

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Midi-to-CV/Gate A-190-21Fig. 1: Schematics1. IntroductionModule A-190-2 is an economically priced alternativ

Midi-to-CV/Gate A-190-2 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER22. Overview Fig. 2: Front panelControls / Displays:1Learn: Learn (momentary switch)2

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Midi-to-CV/Gate A-190-233. In- / Outputs! Midi inputThe Midi input of the A-190-2 is connected to the Midi o

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Universal Vactrol Module A-101-922. Basic PrinciplesAs mentioned in the introduction each sub-unit of theuni

Midi-to-CV/Gate A-190-2 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER4Important note: The module comes with an installed CVjumper, i.e. one has to remove

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Midi-to-CV/Gate A-190-254. Controls1LearnThis is a momentary switch that is used to adjust theparameters of

Midi-to-CV/Gate A-190-2 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER65. OperationTo adjust the A-190-2 parameters one has to enter theLearn mode and send

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Midi-to-CV/Gate A-190-27Function Midi message Note CommentMidi channel/reference for CV1=0V Note on (1)CV3 v

Midi-to-CV/Gate A-190-2 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER8Notes(1) Midi channel/reference for CV1=0VIn case of an incoming note event in the l

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Midi-to-CV/Gate A-190-29(3) Retrigger on/offWith this parameter one can select whether the gate isreset for

Midi-to-CV/Gate A-190-2 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER10(7) CV CharacteristicsWith programm change #19 and #20 one can selectbetween V/Octa

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Midi-to-CV/Gate A-190-2116. User Examples6.1. Simple synthesizer standard patch with one envelope generatorT

Midi-to-CV/Gate A-190-2 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER126.2. Application of A-190-2 and Precision Adder A-185-2In this application the A-18

DOEPFER System A-100 USB/Midi-to-CV/Gate A-190-4 1 1. Introduction The A-190-4 is a MIDI-CV/SYNC Interface, capable to control any A-100

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Universal Vactrol Module A-101-93Normally the vactrol is connected in parallel to theresistor/potentiometer

USB/Midi-to-CV/Gate A-190-4 System A-100 DOEPFER 2 The A-190-4 also has a clock output, controlled by MIDI clock. Incomming MIDI clock can be div

DOEPFER System A-100 USB/Midi-to-CV/Gate A-190-4 3 2. Overview Controls and Display: a. Display : Three-digit LED display shows abbriviat

USB/Midi-to-CV/Gate A-190-4 System A-100 DOEPFER 4 In- / Outputs: 1. USB port: Input for MIDI data. Please do not use MIDI IN socket and USB

DOEPFER System A-100 USB/Midi-to-CV/Gate A-190-4 5 3. Setting up the A-190-4 Before powering up your A-100 system, please use a MIDI- or USB ca

USB/Midi-to-CV/Gate A-190-4 System A-100 DOEPFER 6 4. Operating the A-190-4 4.1. Basic Operation When powered up, the A-190-4 idles for about on

DOEPFER System A-100 USB/Midi-to-CV/Gate A-190-4 7 • Hit the ” 2” button to leave the value level and the return to the parameter level. Hit ”

USB/Midi-to-CV/Gate A-190-4 System A-100 DOEPFER 8

DOEPFER System A-100 USB/Midi-to-CV/Gate A-190-4 9

USB/Midi-to-CV/Gate A-190-4 System A-100 DOEPFER 10 4.3 Menues and Parameters On the following pages you will find a detailed description of all

DOEPFER System A-100 USB/Midi-to-CV/Gate A-190-4 11 MODE (NOTE ASSIGNMENT) Mod The MODE parameter controls the note assignment. It determines wh

doepferSystem A - 100 1. Important notes 11. Important informationAAs well as the important safety notice(see ii - iii) please also read and take

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Universal Vactrol Module A-101-943. OverviewFig. 3: front panelControls:1 CV: polarizer for CV input2 Man.:

USB/Midi-to-CV/Gate A-190-4 System A-100 DOEPFER 12 TUNE tUn This parameter sets the voltage offset for the reference note - and works the same

DOEPFER System A-100 USB/Midi-to-CV/Gate A-190-4 13 For use with the A-100, this parameter should always be set to positive. The negative setting

USB/Midi-to-CV/Gate A-190-4 System A-100 DOEPFER 14 divisor clocks per note note length 1 96 1/96 3 32 1/32 6 16 1/16 12 8 1/8 24 4 1/4 You m

DOEPFER System A-100 USB/Midi-to-CV/Gate A-190-4 15 4.3.5 STORE Function Sto Save your settings permanently with the Store function: The A-190-4

USB/Midi-to-CV/Gate A-190-4 System A-100 DOEPFER 16 4.3.6 INITIALISE Function InI You may want to erase all your parameter settings and reset th

DOEPFER System A-100 USB/Midi-to-CV/Gate A-190-4 17 4.4 Using MIDI Controllers You already learned how to assign Velocity, Pitchbend or Monophoni

USB/Midi-to-CV/Gate A-190-4 System A-100 DOEPFER 18 CONTROLLER #92 (Tremolo) This controller affects the LFO frequency (please refer to LFO menue

DOEPFER System A-100 USB/Midi-to-CV/Gate A-190-4 19 5. Jumper Settings You may customise your A-190-4 to your needs by removing / changing posit

USB/Midi-to-CV/Gate A-190-4 System A-100 DOEPFER 20 6. Application Examples 6.1. Simple synthesizer standard patch with one envelope generator

DOEPFER System A-100 USB/Midi-to-CV/Gate A-190-4 21 6.2. Application of A-190-4 and Precision Adder A-185-2 In this application the A-185-2 is u

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Universal Vactrol Module A-101-954. Controls and In- / Outputs2 Man.: manual vactrol resistance control! CV

USB/Midi-to-CV/Gate A-190-4 System A-100 DOEPFER 22

doepferSystem A - 100CVM 16 A-19211. IntroductionModule A-192 is a CV-to-MIDI interface that converts16 control voltages in the range 0...+5V into

A-192 CVM 16System A - 100doepfer22. OverviewControls and indicators1 Snapshot : Momentary switch (sends a snapshotof all the momentary CV setting

doepferSystem A - 100CVM 16 A-19233. BasicsModule A-192 converts up to 16 analog control volta-ges (CV) in the voltage range 0...+5V into 16 MIDIco

A-192 CVM 16System A - 100doepfer4As soon as one of the 16 input CVs changes thecorresponding MIDI controller messages is generated.In case of a con

doepferSystem A - 100CVM 16 A-1925The snapshot switch may even be used to set the MIDImaster channel. This is not as simple as for PocketControl bec

A-192 CVM 16System A - 100doepfer65. In- / Outputs!!!! CV Inputs 1 ... 16The 16 sockets ! are the control voltage inputs ofthe CV-to-MIDI interface

doepferSystem A - 100CVM 16 A-1927§ MIDI OutThis is the MIDI Out socket. It is connected to theMIDI input of the device controlled by the MIDI data

A-192 CVM 16System A - 100doepfer87. Patch-SheetThe following diagrams of the module can help yourecall your own Patches. They’re designed so that a

doepferSystem A - 100CVM 16 A-1929Appendix: Selecting a Preset with the DIP switch

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Universal Vactrol Module A-101-965. Application ExamplesThe following examples show the silk-screen of theco

A-192 CVM 16System A - 100doepfer1012345678 Preset #: preset name 12345678 Preset #: preset name00000000 Preset 0: Volume Channel 1 - 1600000100 Pre

doepferSystem A - 100PLL A-19611. IntroductionModule A-196 contains a so-called Phase LockedLoop circuit (PLL). A PLL consists of three parts:VC

A-196 PLL System A - 100doepfer22. Basic principlesThe three units VCO, phase comparator (PC) and lowpass filter (LP) form a standard closed-loo

doepferSystem A - 100PLL A-1963Fig. 1: Internal construction of the A-196

A-196 PLL System A - 100doepfer43. OverviewControls:1 Range : Three-position frequency range switchfor the VCO2 Offs. : Frequency offset contr

doepferSystem A - 100PLL A-19654. Controls1 Range • 2 Offs.The frequency range of the internal VCO is selectedwith the switch 1.Control

A-196 PLL System A - 100doepfer65. In- / Outputs! CV InThis socket is the control voltage input of the internalVCO. The socket is normalled to t

doepferSystem A - 100PLL A-19676. User examplesFrequency MultiplicationA very important application of the A-196 is frequencymultiplication. For t

A-196 PLL System A - 100doepfer8A very interesting variant of this patch is the usage ofthe 8 external inputs of the lower A-155 row. Connectthes

doepferSystem A - 100Trautonium / Ribbon Controller A-19811. IntroductionModule A-198 is a so-called Trautonium resp. Rib-bon Controller. It pr

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Universal Vactrol Module A-101-975.1. Envelope Generator A-140 (A, D, R)Affectedpotentiometers:Attack (A):

A-198 Trautonium / Ribbon ControllerSystem A - 100doepfer22. OverviewControls:1 Scale : Scale / spread control for Position Con-trol Voltage outpu

doepferSystem A - 100Trautonium / Ribbon Controller A-19833. Controls1 ScaleThe position sensor of the A-198 is in principle alinear potentiometer

A-198 Trautonium / Ribbon ControllerSystem A - 100doepfer4the Trautonium the sound disappears immediately ifthe finger is removed (no release).3 LED

doepferSystem A - 100Trautonium / Ribbon Controller A-19854. In- / Outputs! CVThe position dependent Control Voltage CVPOS isavailable at this out

A-198 Trautonium / Ribbon ControllerSystem A - 100doepfer65. User ExamplesIn the first place module A-198 and the accessoryposition/pressure sensor

doepferSystem A - 100Trautonium / Ribbon Controller A-1987Fig. 3: “Sound of a hand passing over a wineglass”P By means of the CV-to-MIDI Interface

A-198 Trautonium / Ribbon ControllerSystem A - 100doepfer8Fig. 4: A-198 as a "keyboard"The patch of fig. 4 shows the application of the A

doepferSystem A - 100Trautonium / Ribbon Controller A-1989determines if all semitones or only tones of the minor/major scale or notes of a chord are

A-198 Trautonium / Ribbon ControllerSystem A - 100doepfer106. Patch-SheetThe following diagrams of the module can help yourecall your own Patches.

doepferSystem A - 100Spring Reverb A-19911. IntroductionModule A-199 is a spring reverb module that simula-tes the reverb effect by means of 3 spir

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Universal Vactrol Module A-101-985.3. Envelope Generator A-143-2 (A, D, R)Affected potentiometers:Attack (A

A-199 Spring ReverbSystem A - 100doepfer22. OverviewControls:1 Level : Attenuator for the the audioinput signal at input !2 Feedback : Manual feed

doepferSystem A - 100Spring Reverb A-19933. Controls1 LevelAttenuator 1 controls the level of the input signal fedinto socket !.2 FeedbackKnob 2 co

A-199 Spring ReverbSystem A - 100doepfer44. In- / Outputs! Audio InThe audio signal to be provided with the reverb effectis fed into audio input !.

doepferSystem A - 100Spring Reverb A-1995Fig. 2: Frequency-selective reverbAnother field of activity results from the external feed-back feature (s

A-199 Spring ReverbSystem A - 100doepfer67. Position and assembly of the reverbsystem / Power supply recommendationThe reverb system used in the A-

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Universal Vactrol Module A-101-995.5. Digital Noise A-117 (clock, f1, f2)Affected potentiometers:Digital noi

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Universal Vactrol Module A-101-9105.7. Gate Delay A-162 (delay, length)Affected potentiometers:Delay: P1 (2x

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Universal Vactrol Module A-101-9115.9. A-104 Trautonium filter (frequency, resonance)Affected resistors:freq

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Universal Vactrol Module A-101-9125.11. A-124 Wasp filter (resonance up to self oscillation)Affected resisto

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Universal Vactrol Module A-101-9135.13. A-196 PLL (VCO offset, low pass frequency)Affected potentiometers:VC

System A -100doepfer2Fuse values for different mains voltages and power suppliesType of A-100 caseNetz-span-nungA-100G3, A-100G6A-100P6, A-100P9A-100

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Universal Vactrol Module A-101-9145.15. A-110 VCO (triangle/sine waveshaping)Affected resistor:waveshaping:

doepferSystem A - 100 A-102 • A-10311. IntroductionModules A-102 and A-103 are voltage controlledlow-pass filters that filter out the higher part

A-102 • A-103 System A - 100doepfer22. OverviewControls:1 Freq.: Cut-off frequency control2 CV 2: Attenuator for CV at input "3 CV 3: Attenua

doepferSystem A - 100 A-102 • A-10333. Controls1 Frq.With this control you adjust the Cut-Off Frequency fc,above which the filter attenuates all fre

A-102 • A-103 System A - 100doepfer44. In / Outputs! CV 1Socket CV 1 is the filter’s standard voltage controlinput, and works on the 1V / octave rul

doepferSystem A - 100Trautonium Formant Filter A-10411. IntroductionModule A-104 is a replica of the Formant Filter of the“Mixtur Trautonium” by Os

A-104 Trautonium Formant FilterSystem A - 100doepfer2Controls:1 Input Level : Attenuator for audio inputsignal (effective for all filters)For each

doepferSystem A - 100Trautonium Formant Filter A-1043Fig. 1: Sketch of the A-1043. Controls1 Input LevelAttenuator 1 adjusts the level of the audio

A-104 Trautonium Formant FilterSystem A - 100doepfer4Fig. 2: Frequency response of band pass and lowpass2 Freq.Control 2 is used to adjust the filte

doepferSystem A - 100Trautonium Formant Filter A-10454. In- / Outputs! Audio InThis is the filter’s audio input socket. Patch in theoutput from the

doepferSystem A - 100 2. Overall design32. Overall design2.1 IntroductionFor the A-100 modular system different types of casesare available. As an

A-104 Trautonium Formant FilterSystem A - 100doepfer66. Patch-SheetThe following diagrams of the module can help yourecall your own Patches. They’r

doepferSystem A - 100 A-1051As the modules A-105 and A-122 are identical withregard to operation and functions and differ only in thesound because of

A-105 System A - 100doepfer2

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 X-treme Filter A-106-11Fig. 1: A-106-1 Controls and In/Outputs1. IntroductionModule A-106-1 is an unique low

X-treme Filter A-106-1 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER22. Basic PrinciplesAs mentioned in the introduction, module A-106-1 has it'sorig

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 X-treme Filter A-106-13o Remark for settings 1 and 2: The original MS20circuit was not planned for notch or

X-treme Filter A-106-1 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER4Low pass (no resonance) High pass (no resonance)Pseudo Band pass (no resonance)Pseudo

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 X-treme Filter A-106-15During the A-106-1 development we found also that it mightbe useful to add controls n

X-treme Filter A-106-1 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER6modules into the resonance circuit. The standard applicationis to insert a VCA for vo

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 X-treme Filter A-106-17avoid troubles with the Korg company who is the owner ofthe term "MS20". If