Potatoslicer

Potatoslicer is an audio engine with two front ends. The Python library (pip install potatoslicer-client) has a small, boring API: load a song JSON, get sample arrays back, with a threaded ring buffer for glitch-free playback. The pygame sequencer (pip install potatoslicer) is one consumer of that engine, not the point of it.

The engine is also ported to C++ — a peer implementation, not a binding. It renders into a buffer the caller supplies and never opens an audio device, so it can be driven straight from a game’s audio callback. The two engines are held to the same song format by shared golden renders that both must reproduce sample for sample.

Sound comes from six built-in providers: Cadenza (waveform), Famiwave (pulse/triangle/noise), SuperGaussKit (gaussian interpolation), NightFM (4-operator FM), Meridian (band-limited virtual analog, the only one with stereo width), and a WAV sampler. Songs are plain JSON files you can write by hand or generate, one instrument per channel, so the whole format greps and diffs like code.

It is meant to be embedded: drop the engine into a game, a generative-art piece, a livecoding session, or a server that renders audio on demand. Apache-2.0 licensed, no accounts, no telemetry, nothing phones home. The library and sequencer run entirely on your machine.