Latest version (1.2)

Firmware update procedure


v1.2 (final)

Fixes and minor improvements

  • Fixed a spurious retriggering of the internal envelope when entering/leaving the speech synthesis model.
  • Reduced the amount of software filtering on the TIMBRE and MORPH knobs, to increase their responsiveness.
  • Reduced the amount of hysteresis in the quantizer responsible for converting a voltage into discrete settings (for example, for model selection with the MODEL CV input, or chord selection with the HARMONICS knob and CV input). This makes the relationship between a voltage and a specific setting more consistent when controlled by a sequencer.
  • The filters used for band-limited wavetable synthesis have been improved, eliminating the amplitude drop observed for the highest notes.
  • The frequency range selector has a new mode: octaves. In this mode, the right button and FREQUENCY knob combo adjusts the root note, then the FREQUENCY knob transposes this root note up or down.

8 new synthesis models

Pressing both buttons simultaneously for a very short time (a long press triggers the calibration procedure) enables or disables an alternative way of selecting a synthesis model: the first button selects the previous model, the second button the next one.

In particular, this allows you to navgiate to a bank of 8 new synthesis models:

  • 1 Classic waveshapes with filter (HARMO: resonance and filter character - gentle 24dB/octave CCW, harsh 12dB/octave CW, TIMBRE: filter cutoff, MORPH: waveform and sub level, OUT: LP output, AUX: 12dB/octave HP output)
  • 2 Phase distortion and modulation (HARMO: distortion frequency, TIMBRE: distortion amount, MORPH: distortion asymmetry, OUT: carrier is sync'ed (phase distortion), AUX: carrier is free-running (phase modulation)).
  • 3, 4, 5 2-voice, 6-operator FM synth with 32 presets (HARMO: preset selection, TIMBRE: modulator(s) level, MORPH: envelope and modulation stretching/time-travel). The two voices are alternatively triggered whenever a trigger is received on the TRIG input – this requires CV/Gate signals with accurate timing! When the TRIG input is not patched, a single voice plays as a drone, and the MORPH knob allows time-travel along the envelopes and modulations. The LEVEL input is repurposed as a velocity control - controlling loudness or timbre depending on how each preset is programmed. Each model corresponds to a different bank of 32 presets among basses/synths, keyboards/plucked strings/percussions, organs/pads/strings/brass.
  • 6 Wave terrain synthesis with continuous interpolation between eight 2D terrains (HARMO: terrain, TIMBRE: path radius, MORPH: path offset, OUT: Direct terrain height (z), AUX: Terrain height interpreted as phase distortion (sin(y+z)).
  • 7 String machine emulation with stereo filter and chorus (HARMO: chord, TIMBRE: chorus/filter amount, MORPH: waveform, OUT: voices 1&3 predominantly, AUX: voices 2&4 predominantly).
  • 8 Four variable square voices for chords or arpeggios (HARMO: chord, TIMBRE: arpeggio type or chord inversion, MORPH: PW/Sync, OUT: square wave voices, AUX: NES triangle voice, TIMBRE attenuverter: envelope shape). Plug a trigger input to clock the arpeggiator.

Model customization and online editor

The module can receive audio data on its TIMBRE input to load custom data into a synthesis model (only one synthesis model can be altered at a time). This new feature is available for the following models:

  • 6-operator FM: transfer of 32 custom patches in DX7 SysEx format. They will replace one of the built-in banks.
  • Wave terrain synthesis: transfer of a custom wave terrain, accessible with HARMONICS turned fully CW.
  • Wavetable synthesis: transfer of 15 custom waveforms and customization of bank D's wave map (in replacement of that bank's randomized selection of waveforms).

Try the editor here (fully tested on Chrome)!


  • Powering the module on while pressing the right button enables (or disables) the color-blind mode. A different brightness level, instead of the green and red colors, is used to distinguish the first and second group of models.

  • The frequency range/octave setting has a new setting (represented by a "chasing lights" pattern) for LFO operation. In LFO mode, the FREQUENCY knob goes from about 0.015 Hz (1 minute) to about 16 Hz.


Initial release.