Specifications

Dual analog VCA and 2-pole VCF, with digital control path. The control voltages for these two analog circuits are digitally generated, by “reacting to,” “following” or “listening to” a multi-purpose input called EXCITE.

Digital control modes

  • AD or AR envelope generator.
  • Vactrol response generator – gated or pinged/struck.
  • Amplitude and cutoff follower.
  • Compressor.

I/O (per channel)

  • Multi-purpose EXCITE input.
  • DC-coupled Audio/CV input (normalized to +5V constant voltage).
  • VCA gain CV (normalized to +8V constant voltage).
  • Output.

Controls (per channel)

  • Digital control mode selection.
  • Response time / compression threshold.
  • Modulation amount / compression ratio and makeup gain.
  • VCA gain CV input attenuator.
  • VCA exponential to linear response curve.

Technical characteristics

  • Analog signal path.
  • All inputs DC-coupled.
  • 12-bit, 31kHz EXCITE signal acquisition (for metering and following).
  • 16-bit, 31kHz control voltage generation.
  • Cortex-M3 ARM processor.
  • Open-source hardware and firmware.
  • 12-HP.
  • Easy firmware updates through an audio interface.
  • Current consumption: +12V: 100mA ; -12V: 30mA.

Olivier Gillet, Mutable instruments SARL 2011-2017. Except where otherwise noted, content on this site is licensed under a cc-by-sa 3.0 license.