- 4 optical buttons, with velocity capacity (for four fingers, to play an Expreseur-score)
- 3 buttons (to play a piano-pedal, arppegiate, move in the score )
- 3 linear cursors to set the volume and the dynamic (or to mix the sound rendering )
- 3 leds to display the velocity read by the optical buttons
- a MIDI sound-expander embedded from serdashop
- The box is 3D printed from STL files (and OpenScad design).
- Teensy 4 is used, to control the hardware + USB/MIDI
- USB/MIDI connection to Expresseur
- audio jack output from the MIDI sound-expander
- C code opensource for the teensy 4
- Do It Yourself
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