# October 16, 2025

## Flux: Expanded Audio Format Support

Flux now supports a wider range of audio formats beyond `linear16`, giving you more flexibility in how you send audio to our conversational speech recognition model. This update adds support for additional raw audio encodings and containerized audio formats.

### Raw Audio Format Support

Flux now accepts the following raw (non-containerized) audio encodings:

- `linear16` - 16-bit signed little-endian PCM (existing)
- `linear32` - 32-bit signed little-endian PCM (new)
- `mulaw` - Mu-law encoding (new)
- `alaw` - A-law encoding (new)
- `opus` - Opus codec (new)
- `ogg-opus` - Opus in Ogg container (new)

When using raw audio formats, you must specify both the `encoding` and `sample_rate` parameters in your API request.

### Containerized Audio Support

Flux now also accepts containerized audio formats, eliminating the need to manually specify encoding and sample rate parameters:

- **WAV containers** with `linear16` encoding
- **Ogg containers** with `opus` encoding

When sending containerized audio, **omit** the `encoding` and `sample_rate` parameters—Flux will automatically detect these from the container metadata.

### Supported Sample Rates

For raw audio, Flux supports the following sample rates:

- 8000 Hz
- 16000 Hz (recommended)
- 24000 Hz
- 44100 Hz
- 48000 Hz

### Implementation

**For raw audio:**

```
wss://api.deepgram.com/v2/listen?model=flux-general-en&encoding=linear16&sample_rate=16000
```

**For containerized audio:**

```
wss://api.deepgram.com/v2/listen?model=flux-general-en
```

For detailed information about Flux audio requirements, see our [Flux documentation](/guides/streaming-audio-flux-quickstart).

## Related pages

- [Amazon SageMaker](./amazon-sagemaker-index.md)
- [Aura](./aura-index.md)
- [Changelog](../changelog.md)
- [Custom Vocabulary](./custom-vocabulary-index.md)
- [Deepgram's Docs](../index.md)
- [Deployment](./deployment-index.md)
- [Docker/Podman](./docker-podman-index.md)
- [Features](./features-index.md)
- [Flux TTS](./flux-tts-index.md)
- [Formatting](./formatting-index.md)

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