---
title: AVAudioMixInputParametersTrackID
framework: avfoundation
role: symbol
role_heading: Enumeration
path: avfoundation/avaudiomixinputparameterstrackid
---

# AVAudioMixInputParametersTrackID

## Declaration

```swift
enum AVAudioMixInputParametersTrackID
```

## Overview

Overview Special value for the trackID property of AVAudioMixInputParameters. Indicates that the specified input parameters should be applied to the mix of all audio tracks rather than to a single specific audio track. This is particularly useful for setting up volume ramps or an audio tap for streaming playback.

## Topics

### Creating a track identifier

- [init(rawValue:)](avfoundation/avaudiomixinputparameterstrackid/init(rawvalue:).md)

### Track identifiers

- [AVAudioMixInputParametersTrackID.mixID](avfoundation/avaudiomixinputparameterstrackid/mixid.md)

## Relationships

### Conforms To

- [BitwiseCopyable](swift/bitwisecopyable.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [RawRepresentable](swift/rawrepresentable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Mixing

- [AVAudioMix](avfoundation/avaudiomix.md)
- [AVAudioMixInputParameters](avfoundation/avaudiomixinputparameters.md)
- [AVMutableAudioMix](avfoundation/avmutableaudiomix.md)
- [AVMutableAudioMixInputParameters](avfoundation/avmutableaudiomixinputparameters.md)