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# AVMutableAudioMixInputParameters

The parameters you use when adding an audio track to a mix.

```
class AVMutableAudioMixInputParameters
```

## Topics

### Creating input parameters

[`audioMixInputParameters`](/documentation/AVFoundation/AVMutableAudioMixInputParameters/audioMixInputParameters)

Creates a mutable input parameters object.

[`init(track:)`](/documentation/AVFoundation/AVMutableAudioMixInputParameters/init(track:))

Creates a mutable input parameters object for a given track.

### Managing the track ID

[`trackID`](/documentation/AVFoundation/AVMutableAudioMixInputParameters/trackID)

The identifier of the audio track to which the parameters should be applied.

### Setting the volume

[`setVolume(_:at:)`](/documentation/AVFoundation/AVMutableAudioMixInputParameters/setVolume(_:at:))

Sets the value of the audio volume starting at the specified time.

[`setVolumeRamp(fromStartVolume:toEndVolume:timeRange:)`](/documentation/AVFoundation/AVMutableAudioMixInputParameters/setVolumeRamp(fromStartVolume:toEndVolume:timeRange:))

Sets a volume ramp to apply during a specified time range.

### Getting an audio tap

[`audioTapProcessor`](/documentation/AVFoundation/AVMutableAudioMixInputParameters/audioTapProcessor)

The audio processing tap associated with the track.

### Time pitch settings

[`audioTimePitchAlgorithm`](/documentation/AVFoundation/AVMutableAudioMixInputParameters/audioTimePitchAlgorithm)

The processing algorithm used to manage audio pitch for scaled audio edits.

[`AVAudioTimePitchAlgorithm`](/documentation/AVFoundation/AVAudioTimePitchAlgorithm)

An algorithm used to set the audio pitch as the rate changes.


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