doepfer-a-111-6

Doepfer A-111-6 Miniature Synthesizer Voice

Complete monophonic voice: VCO, VCF, VCA, dual LFO, ADSR

24 HP Eurorack module

The A-111-5 Mini Synthesizer Voice is a complete monophonic synthesizer in a single Eurorack module, containing a VCO, 24dB low-pass VCF, VCA, two LFOs, and an ADSR envelope generator. It delivers a classic subtractive synthesis voice with deep internal modulation routing, capable of everything from fat sawtooth basses to FM-flavored leads and self-oscillating sine wave tones. The module is the Eurorack incarnation of the standalone Doepfer Dark Energy synthesizer.

Features

  • Complete monophonic synthesizer voice in one module: VCO, VCF, VCA, LFO1, LFO2, ADSR
  • VCO with sawtooth, triangle, and rectangle waveforms; frequency range 10Hz to 12kHz
  • Rectangle wave pulsewidth control with LFO2 or ADSR PWM modulation source
  • 24dB low-pass VCF with manual frequency control over approximately 12 octaves (5Hz to 20kHz)
  • VCF exponential FM (XM) with LFO2 or ADSR source
  • VCF linear FM (LM) from VCO triangle wave for stable FM sounds
  • VCF self-oscillation capable; precise 1V/octave tracking for use as sine wave oscillator
  • VCF tracking switch: full, half, or no tracking of VCO frequency
  • VCA with special exponential-to-linear control scale (-20dB to -80/90dB exponential, -20dB to 0dB linear)
  • VCA amplitude modulation with LFO1 or ADSR source
  • Two LFOs (LFO1, LFO2) with triangle and rectangle waveforms; three frequency ranges each (low, high, medium)
  • LFO frequency ranges overlap; audio-rate FM/PWM/AM effects possible (up to approximately 5kHz)

Controls & Jacks (26)

  • VCO Pulsewidth Modulation Level— Adjusts intensity of pulsewidth modulation
  • VCA AM Source— Selects amplitude modulation source: LFO1 (upper), off (center), or ADSR (lower)
  • VCO FM Source— Selects FM modulation source: LFO1, off, or ADSR
  • ADSR LED— Blue LED display indicating envelope state
  • VCO Tune— Manual tuning of VCO frequency over roughly one octave (±½ octave), extendable to six octaves via internal jumper JP4
  • VCF Resonance— Manual resonance/emphasis control; at maximum position the filter self-oscillates and acts as a sine wave oscillator
  • VCA AM Source— Selects amplitude modulation source: LFO1 (upper), off (center), or ADSR (lower)
  • External Audio— External audio input mixed into VCF, processed through filter and VCA
  • VCO FM Level— Adjusts intensity of VCO frequency modulation with exponential scale for finer control
  • VCO F— VCO frequency control input, 1V/octave, works additively with manual tune control and internal modulations
  • Audio Out— Audio output of the synthesizer voice, typical output level 1V
  • ADSR— ADSR envelope output signal available as additional socket for external modulation
  • ADSR Gate— Gate input to trigger ADSR envelope, requires voltage between +5V and +12V
  • ADSR Range— Selects ADSR envelope time range: low (~0.1s to 100s), high (~200µs to 0.2s), or medium (~2ms to 2s)
  • 1V/Oct
  • VCF Exponential FM Source— Selects exponential FM (XM) source for VCF: LFO2 (upper), off (center), or ADSR (lower)
  • VCO Waveform— Selects VCO waveform: triangle (upper), off/no wave (center), or sawtooth (lower)
  • VCF Frequency— Manual frequency control for the 24dB low-pass filter, spanning approximately 12 octaves (5Hz to 20kHz)
  • VCA Balance
  • VCA Gain
  • Env Att
  • Env D/R
  • Env
  • CV Bal.
  • Mod
  • VCF FM2

How-To Guides

  • Classic Subtractive Bass Patch
  • Slow PWM Pad
  • VCF as Sine Wave Oscillator with FM
  • Audio-Rate LFO FM Madness
  • Percussive Pluck or Drum Sound
  • Slow Tremolo and Vibrato
  • External Audio Through VCF and VCA
  • Brassy ADSR Pitch Envelope
  • Long Evolving Ambient Texture
  • Rhythmic Filter Gate with Rectangle LFO

Explore the interactive A-111-6 Miniature Synthesizer Voice panel on BleepDex — tap any control to learn what it does.

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