Doepfer

Lineup 15 ingested · audit-only catalog

Lineup transcribed from https://doepfer.de/a100e.htm ↗, last checked 2026-05-13.

• A-110-1 Standard VCO current 10 HP vco

  Voltage-controlled oscillator producing four waveforms simultaneously (square, sawtooth, triangle, sine) with a frequency range of about ten octaves, controlled by Range switch, Tune knob, and CV inputs.

• A-111-6 Miniature Synthesizer Voice current 10 HP vco vcf vca

  Complete monophonic synthesizer voice in 10HP featuring a triangle-core VCO with sub-octave, a balance/mixer unit, 24dB lowpass VCF (self-oscillating), VCA, and an AD/ADSR/AR envelope generator.

• A-118 Noise/Random current 8 HP random-voltage-source

  A noise and random voltage generator producing white noise, colored noise, and random voltage.

• A-120 24dB Low Pass 1 current 8 HP lowpass-filter vcf

  Voltage controlled 24dB/octave transistor ladder lowpass filter with three CV inputs, manual cutoff frequency control, and resonance adjustable to self-oscillation.

• A-124 Wasp Filter current 8 HP multimode-filter vcf

  Special voltage-controlled multimode filter with a cut-off slope of -12dB/octave, using the peculiar electronic circuitry of the EDP Wasp synthesizer. Abuses digital inverters as analog operational amplifiers. Has band-pass output and combined low/notch/high-pass output. Cannot self-oscillate.

• A-126-2 Voltage Controlled Frequency Shifter II current 8 HP frequency-shifter
• A-128 Fixed Filter Bank current 20 HP fixed-filter-bank multiband-filter

  15-band fixed filter bank made up of 15 parallel band pass filters with fixed middle frequencies and bandwidth; each band has its own amplitude control knob for attenuation.

• A-137-1 Wave Multiplier 1 current 14 HP wavefolder

  Voltage controlled waveform multiplier with 4 wave-folding stages, a VCA for Multiples control, and independent manual and CV control over Multiples, Folding Level, Symmetry, and Harmonics parameters. Acts as an inverse low-pass filter, adding harmonics to signals with few harmonics (e.g. triangle or sine). Fully DC coupled.

• A-137-2 Wave Multiplier II current 14 HP wavefolder

  Wave Multiplier II: generates four phase-shifted copies of an audio input signal (sawtooth, triangle, or sine) and adds them to the original to produce a fat sound similar to five independent VCOs. Phase shifting is achieved by comparing the input with a slowly varying CV; the resulting rectangle is algebraically added to produce shifted waveforms.

• A-138s Mini Stereo Mixer current 8 HP attenuverter mixer stereo-mixer

  A simple but effective 4-in-2 stereo mixer with four inputs, each with a Level attenuator and Pan control, routing signals to Left and Right outputs. DC coupled for use with both audio and control signals.

• A-150-1 Dual Voltage Controlled Switch current 4 HP signal-switch vc-switch

  Dual voltage-controlled switch containing two independent bidirectional switches. Each switch routes a common Out/Input to one of two In/Outputs based on the control voltage level. Two LEDs indicate which output is active.

• A-151 Quad Sequential Switch current 4 HP signal-switch sequential-switch

  Electronic four-position rotary sequential switch with trigger and reset inputs, four bidirectional I/O jacks, a common Out/Input, four LEDs indicating the active step, and a toggle switch to limit steps to 2, 3, or 4.

• A-183-2 Offset-Generator / Attenuator / Polarizer current 4 HP attenuverter attenuator offset-generator polarizer

  Voltage offset generator combined with an attenuator/polarizer. A toggle switch selects between attenuator and polarizer (attenuverter) modes. The DC offset is adjustable via the Offset knob, and the input signal can be attenuated or bipolar-scaled and added to the offset voltage.

• A-129/1 Vocoder Analyzer discontinued 20 HP vocoder

  Vocoder analyzer section. Splits a speech/voice signal through a bank of 13 bandpass filters plus 1 lowpass and 1 highpass filter, with an envelope follower per band producing 15 CV outputs that track the spectral envelope of the input signal.

• A-129/2 Vocoder Synthesizer discontinued 12 HP vocoder

  Synthesis section of the A-129 modular vocoder. Takes a carrier signal through a bank of 15 bandpass/lowpass/highpass filters, each with a VCA controlled by CV inputs from the A-129/1 analysis section, producing the classic vocoder effect. Can also be used as a standalone voltage-controlled filter bank.

• A-102 Diode Low Pass Filter ↗ current lowpass-filter vcf
• A-103 18dB Low Pass Filter (TB-303) ↗ current lowpass-filter vcf
• A-104 Trautonium Formant Filter ↗ current formant-filter multiband-filter vcf
• A-105-2 24dB SSI Low Pass Filter ↗ current lowpass-filter vcf
• A-106-5 12dB SEM Filter ↗ current multimode-filter vcf
• A-108 6/12/24/48dB Low Pass Filter ↗ current lowpass-filter vcf
• A-121-2 12dB Multimode Filter II ↗ current multimode-filter vcf
• A-121-3 12dB Multimode Filter (Slim Line) ↗ current multimode-filter vcf
• A-121d Dual Multimode Filter ↗ current multimode-filter vcf
• A-121s Stereo Multimode Filter ↗ current multimode-filter vcf