---
title: PHASEMixer
framework: phase
role: symbol
role_heading: Class
path: phase/phasemixer
---

# PHASEMixer

An object that combines multiple audio signals into a single signal.

## Declaration

```swift
class PHASEMixer
```

## Overview

Overview Mixers provide a single point of control over the multiple audio signals they combine. To create a mixer, you provide the framework with a mixer definition; see PHASEMixerDefinition. Subclasses of this class define unique properties the app sets to control specific features. For example, the spatial mixer (PHASESpatialMixerDefinition) adds environmental effects into the output audio signal.

## Topics

### Adjusting Volume

- [gain](phase/phasemixer/gain.md)
- [gainMetaParameter](phase/phasemixer/gainmetaparameter.md)

### Retrieving the Mixer Identifier

- [identifier](phase/phasemixer/identifier.md)

## Relationships

### Inherits From

- [NSObject](objectivec/nsobject-swift.class.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)

## See Also

### Audio Layering and Effects

- [PHASEChannelMixerDefinition](phase/phasechannelmixerdefinition.md)
- [PHASEAmbientMixerDefinition](phase/phaseambientmixerdefinition.md)
- [PHASEMixerDefinition](phase/phasemixerdefinition.md)
- [PHASEDefinition](phase/phasedefinition.md)
- [Spatial Mixing](phase/spatial-mixing.md)