Teenage Engineering's PO-32 acoustic modem and synth implementation (github.com)

The GitHub project libpo32 provides a freestanding C99 library that reimplements the Teenage Engineering PO-32’s acoustic transfer protocol, including building and decoding patch, pattern, and state packets, plus rendering transfer frames to DPSK audio for playback. It also includes a compatible local drum synthesis “voice” to preview drum data without acting as a full PO-32 firmware or UI emulator. The repository includes demo programs that exercise an end-to-end encode/render/decode workflow and generate WAV files for testing.