uploaded 12 hours ago
breezy_sound: 8-voice synth mixer and PCM stream API used in BreezyBox, a mini shell for esp32
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# breezy_sound The BreezyBox sound engine: an 8-voice PICO-8-flavored synth mixer plus a single raw PCM stream, mixed by a background task at 44.1 kHz s16 and fed to the board's audio output. `snd_core.h` is the API that loadable ELF apps (soundkeys, moddy, ...) link against by symbol name, so it stays identical across boards. The engine is hardware-agnostic. Each firmware project supplies one `snd_port.c` implementing the small contract in `snd_port.h`: - `snd_port_desc` — output format (mono/stereo) and the per-speaker limiter ceiling - `snd_port_init()` — set up the codec/I2S path, leave it stopped - `snd_port_start()` / `snd_port_stop()` — power the output up/down - `snd_port_write()` — blocking write of one rendered chunk (this back-pressure paces the mixer) See the reference ports in the BreezyBox repo: `examples/p4-tanmatsu/main/snd_port.c` (ES8156 codec via badge-bsp, stereo) and `examples/s3-waveshare/main/snd_port.c` (MAX98357A mono amp, bare I2S). Remember to export the `snd_*` symbols to ELF apps in your firmware's customer symbol table (see the examples' `elf_extras.c`). ## License MIT
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Maintainer
- Valentyn Danylchuk <val@danylchuk.com>
To add this component to your project, run:
download archive
idf.py add-dependency "valdanylchuk/breezy_sound^1.0.0"
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