Specifications

Inputs

  • Signal in
  • Frequency CV 1 (1V/Oct)
  • Resonance CV. Self oscillation starts at 4V. Control voltages above 5V are non-linearly compressed, for fine control of resonance overdrive
  • Frequency CV 2 (with bipolar attenuator, from -1V/Oct to 1V/Oct)
  • VCA level. Control voltages above 5V are non-linearly compressed.

Controls

  • Cutoff frequency, 18Hz to 18kHz
  • Resonance (self oscillation at 80%)
  • Attenuverter on Frequency CV

Outputs

  • 2-pole BP
  • 2-pole LP
  • 4-pole LP
  • 4-pole LP attenuated by VCA

Technical characteristics

  • Fully analog, based on SSM2164 low noise/distortion quad VCA chip, and LM13700 OTA for that extra bit of non-linearity.
  • Frequency CV inputs impedance: 100k.
  • Audio input impedance: 75k.
  • Resonance and VCA CV input impedance: 30k.
  • Open-source hardware.
  • 8-HP.
  • Current consumption: +12V: 35mA ; -12V: 35mA.

Olivier Gillet, Mutable instruments SARL 2011-2016. Except where otherwise noted, content on this site is licensed under a cc-by-sa 3.0 license.