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Erica Synths Black VCO

Erica Synths Black VCO


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Erica Synths Black VCO is an analogue VCO with four simultaneous waveform outputs and one octave down sub-oscillator.


  • Simultaneous sine, triangle, saw and pulse wave outputs
  • -1 octave sub-oscillator
  • Manually adjustable and CV controlled pulse width
  • Great tracking across 8 octaves
  • Exponential FM input with attenuator
  • Synchronization input
  • Octave switch – 5 octaves
  • Skiff-friendly design

 The core of the VCO is borrowed from a famous Russian synth Polivoks VCO and in the exponential converter we use the original matched transistor IC that was used in Polivoks. Unlike harsh logic divider based sub-oscillators, Black VCO transistor-based sub-oscillator generates a distinct, rounded square wave. Together with the Black VCO Expander a waveform mixer you get a massive analogue sound source with plenty of patch points for modular use.

Erica Black series are high-end modules with unique functionality. Only the highest quality components are used and all inputs and outputs are protected against undesired overvoltage. When designing the Black Series, we did not economise on the module width, we put design and usability first. Big knobs are assigned to functions that make difference in sound.  Together the Erica Black series are a range of modules that make an entire synthesizer.

Technical specifications:

CV level

-10V – +10V

Audio output amplitude


Octave range

C0 – C8

Panel width


Module depth


Power consumption

40mA@+12V, 36mA@-12V

Power consumption w. Expander

55mA@+12V, 40mA@-12V