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# setOutputDataSource(_:)

Sets the output data source for an audio session.

```
func setOutputDataSource(_ dataSource: AVAudioSessionDataSourceDescription?) throws
```

## Parameters

`dataSource`

The data source for the audio session’s output.

## Discussion

You can change the output source to one of the [`AVAudioSessionDataSourceDescription`](/documentation/AVFAudio/AVAudioSessionDataSourceDescription) objects in the [`outputDataSources`](/documentation/AVFAudio/AVAudioSession/outputDataSources) array. Only certain USB accessories support this feature.

---

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