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# audioTapProcessor

The audio processing tap associated with the track.

```
var audioTapProcessor: MTAudioProcessingTap? { get }
```

## Discussion

You can use the audio tap to access the track’s audio data before it is played, read, or exported. This property is `nil` by default.

The process of setting up a tap requires the configuration of an instance of [`AVMutableAudioMixInputParameters`](/documentation/AVFoundation/AVMutableAudioMixInputParameters). If an instance of [`AVMutableAudioMixInputParameters`](/documentation/AVFoundation/AVMutableAudioMixInputParameters) is present in the [`inputParameters`](/documentation/AVFoundation/AVAudioMix/inputParameters) array of an [`AVAudioMix`](/documentation/AVFoundation/AVAudioMix), the results of mutating the [`AVMutableAudioMixInputParameters`](/documentation/AVFoundation/AVMutableAudioMixInputParameters) while the audio mix is in use are undefined

---

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