Playback is handled by [cpal](https://github.com/RustAudio/cpal). Format decoding can be handled either by [Symphonia](https://github.com/pdeljanov/Symphonia), or by format-specific decoders:
- MP3 by [minimp3](https://github.com/lieff/minimp3) (but defaults to [Symphonia](https://github.com/pdeljanov/Symphonia)).
- WAV by [hound](https://github.com/ruud-v-a/hound).
- Vorbis by [lewton](https://github.com/est31/lewton).
- FLAC by [claxon](https://github.com/ruuda/claxon).
- MP4 and AAC (both disabled by default) are handled only by [Symphonia](https://github.com/pdeljanov/Symphonia).
See [the docs](https://docs.rs/rodio/latest/rodio/#alternative-decoder-backends) for more details on backends.
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