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.

Input

• 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.

Output

• 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).

Controls

• 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 options

https://www.kickstarter.com/projects/birdkids/raven-a-100-analog-synthesizer-voice-made-in-austr

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

This Module is currently available.