Much More

An ambitious open-source synth project expands an earlier six-voice design into a 12-voice bi-timbral instrument. A Teensy 4.1-based controller and assigner coordinates two self-contained voice boards, while separate display hardware keeps both layers visible during editing.

The sound architecture uses a dual-DCO core for each voice, with multisaw, pulse, triangle, sub-oscillator, sync, cross-modulation, two LFOs, an ADSR modulation envelope, portamento, pitch bend, velocity, and aftertouch control. The controller sends commands to the two voice boards on separate MIDI outputs and updates the display system independently as layers or parameters change.

Encoder-based panel controls remain continuously variable, while button LEDs show switch states and the displays distinguish the lower layer in yellow from the upper layer in cyan. The controller, voice-board control code, DCO engine, and display hardware are documented across public repositories.