RAVEN is a 100% analog, semi-modular, synthesizer voice.

RAVEN's system-architectural idea was about going back to the basics of subtractive synthesis.
We wanted to capture the raw, non-linearity and honesty of a 100% analog circuit.
The main engineering challenge of RAVEN was consolidating a highly complex conglomerate of modular, discrete designs into a slim 3U/42HP (Eurorack) form-factor resulting in a uniquely sounding subtractive,
semi-modular, high-performance, musical instrument.

RAVEN is comprised of:

  • Dual, wide-range Voltage Controlled Oscillators.
  • The original TheBateleur (Ⓡ pending) Voltage Controlled Filter.
  • Two Voltage Controlled Amplifier outputs - A high-performance THAT2162 BlackmerⓇ VCA
    and an Optocoupler VCA reminiscent of legendary West-Coast designs.

RAVEN combines the simplicity of a performance-friendly, semi-modular synthesizer voice with fully-modular, infinitely flexible, workflow possibilities by assigning Control Voltage I/O’s at (almost) every point in the signal workflow. Each modular component can be seen as a standalone, self-sufficient entity.
The VCF can be bypassed to allow for a VCO (I+II Sum) to VCA operation and thus used as a standalone VCF or third voice in self-oscillation, perfectly tracking 1V/Oct by choice.



  • 1V/Oct (Pitch tracking) relative and absolute options for both oscillators and VCF.
  • FM (Linear Frequency Modulation) per VCO.
  • PWM (Pulse Width Modulation) per VCO.
  • SYNC per VCO.
  • Crossfader between VCO’s.
  • External Audio Signal Input.
  • VCF Cutoff.
  • VCF CV Input.
  • VCF Resonance.
  • VCA CV Input.


  • Individual Waveform outs for each VCO (Saw, Triangle, Pulse / Square).
  • Noise Output.
  • Filter Output.
  • Clean Out (Linear THAT2162 BlackmerⓇ VCA).
  • Opto Out (Optocoupler VCA, West-Coast style response).


  • Waveform selection toggle per VCO.
  • PW position for VCO II.
  • PWM amount either individually for VCO I or normalized for both.
  • FM amount either individually for VCO I or normalized for both.
  • Coarse Tune for VCO I (relative or absolute via jumper).
  • Fine Tune for VCO II (relative).
  • Crossfader position VCOs I/II.
  • External Audio Signal Input Amount.
  • VCA CV Amount / Initial VCA Gain.
  • VCF Cutoff position.
  • VCF Mode switch
  • VCF CV Amount.
  • VCF Resonance position / CV Amount.

VCF Modes
* **subtractive
= VCO (I+II Sum) > VCF > VCA
* bypass = VCO (I+II Sum) > VCA, VCF standalone
* bypass & tracking = VCO (I+II Sum) > VCA, VCF Standalone and tracking 1V/Oct.

panel reference

Panel options

black & lilac

silver & blue


  • 250 mA +12V
  • 120 mA -12V
  • ? mA 5V
  • 30 mm deep

This Module is currently available.

$1,063 Price in € submitted Nov 22nd 2018, 14:11 by birdkid

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