Mutable Instruments

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Two rows of mostly Mutable Instruments Eurorack format modules.

Mutable Instruments (MI) based in France is a manufacturer of Eurorack synthesizer modules, founded in 2009 selling DIY kits and owned by the designer/engineer Émilie Gillet. All MI products are are fully open source hardware under a CC-BY-SA license.[1]

Eurorack modules

MI modules do not easily fit the usual synth module categories.[1]

Modulation sources

  • Stages, segment generator
  • Tides, tidal modulator
  • Peaks, envelope/LFO/tap LFO/drum generator


Sequencing and control

  • Ears, contact microphone
  • Frames, mixer/keyframer
  • Grids, topographic drum sequencer
  • Marbles, random sampler
  • Yarns, 4-channel MIDI interface

Sound modifiers

Sound sources

Desktop synths

  • Shruthi, hybrid monosynth with a large palette of analog filter boards.
  • Ambika, 6-voice hybrid polysynth.
  • Anushri, digitally controlled analog monosynth.

Other devices

  • CVpal, simple USB to CV/Gate interface.
  • MIDIpal, MIDI event processor.


  1. ^ a b Interview with Olivier Gillet (Mutable Instruments) by Tom Ferguson, Keith McMillen Instruments, September 2015

External links

Firmware hacking