Output formats

The output_format query parameter selects the audio encoding. Non-streaming TTS accepts mp3, wav, flac, pcm, aac, and opus. Streaming supports mp3 and pcm.

Supported encodings

Value	Format	Notes
`mp3`	MP3	Default. Best for general playback.
`wav`	WAV	Uncompressed, lossless.
`flac`	FLAC	Lossless compression.
`pcm`	Raw PCM	Linear PCM for audio pipelines.
`aac`	AAC	Efficient lossy codec.
`opus`	Opus	Non-streaming only.

Choosing a format

End-user playback in a browser or app — prefer mp3.
Real-time applications — use the streaming endpoint with mp3 or pcm.
Archival or post-processing — use wav or flac for lossless output.