This project turns the Circuit Playground Express (CPX) board into a touch pad USB MIDI controller with tilt control for modulation and pitch bend similar to the excellent Trellis M4 Expressive MIDI controller project.
A second partner program creates a basic MIDI-enabled synthesizer using the onboard speaker.
The USB MIDI features require CircuitPython 4.x or higher and a recent version of the
No additional hardware is required beyond the Circuit Playground Express board. Multiple boards can be used to increase the note range on the controller or for simple polyphony on the synthesizer.