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# sink

An audio stream sink that defines how the host handles audio data produced by the guest.

```
var sink: VZAudioOutputStreamSink? { get set }
```

## Discussion

Not specifying a sink results in a default handler that suppresses the audio. The default is `nil`.

## See Also

[`VZAudioOutputStreamSink`](/documentation/Virtualization/VZAudioOutputStreamSink)

The base class for an audio output stream sink.

[`VZHostAudioOutputStreamSink`](/documentation/Virtualization/VZHostAudioOutputStreamSink)

Host audio output stream sink plays audio to the host system’s default output device.


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