doepfer-a-110-1

Doepfer A-110-1 Standard VCO

Classic analog VCO with four simultaneous waveform outputs

10 HP Eurorack module

The Doepfer A-110-1 is a standard analog voltage-controlled oscillator and one of the foundational modules in the A-100 system. It provides four simultaneous waveform outputs — sawtooth, triangle, pulse, and sine — with accurate 1V/Oct tracking, linear and exponential FM inputs, hard sync, and pulse width modulation. A straightforward, reliable VCO for building classic subtractive patches.

Features

  • 4 simultaneous waveform outputs: sawtooth, triangle, pulse, sine
  • 1V/Oct exponential CV tracking input
  • Linear FM input for through-zero-style modulation
  • Exponential FM input with attenuator
  • Pulse width modulation via CV or manual control
  • Hard sync input for timbral effects
  • Coarse and fine frequency tuning knobs
  • Wide frequency range from sub-audio LFO rates to high audio

Controls & Jacks (15)

  • PWM Level— Attenuator controlling the depth of voltage-controlled pulse width modulation
  • CV2— Secondary frequency modulation CV input with level attenuator
  • CV1 Level— Attenuator for the CV1 input signal controlling frequency modulation depth
  • CV2 Level— Attenuator for a secondary CV input signal controlling frequency modulation depth
  • Tune— Fine-tuning control; approximately +/-1 semitone on older units, +/-1/2 octave on units from mid-2015 onward
  • Rectangle Out— Rectangle/square waveform audio output at approximately 8Vpp with adjustable pulse width
  • CV1— Primary 1V/octave pitch CV input, normalled to Doepfer bus CV when no cable is inserted
  • Sawtooth Out— Sawtooth waveform audio output at approximately 8Vpp
  • Sine Out— Sine waveform audio output at approximately 10Vpp
  • PWM CV— CV input for voltage-controlled pulse width modulation of the rectangle waveform
  • Pulse Width— Manual pulse width adjustment for the rectangle/square waveform
  • Triangle Out— Triangle waveform audio output at approximately 10Vpp
  • Sync— Hard sync input that resets the oscillator to the beginning of its waveform cycle
  • PWM CV— input cv
  • Pulse Out— Pulse/square wave output with variable pulse width.

Explore the interactive A-110-1 Standard VCO panel on BleepDex — tap any control to learn what it does.

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