---
title: audioTapProcessor
framework: avfoundation
role: symbol
role_heading: Instance Property
path: avfoundation/avaudiomixinputparameters/audiotapprocessor
---

# audioTapProcessor

The audio processing tap associated with the track.

## Declaration

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

## Discussion

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. If an instance of AVMutableAudioMixInputParameters is present in the inputParameters array of an AVAudioMix, the results of mutating the AVMutableAudioMixInputParameters while the audio mix is in use are undefined