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# PHASEMixer

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

```
class PHASEMixer
```

## 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`](/documentation/PHASE/PHASEMixerDefinition).

Subclasses of this class define unique properties the app sets to control specific features. For example, the spatial mixer ([`PHASESpatialMixerDefinition`](/documentation/PHASE/PHASESpatialMixerDefinition)) adds environmental effects into the output audio signal.

## Topics

### Adjusting Volume

[`gain`](/documentation/PHASE/PHASEMixer/gain)

The mixer’s volume.

[`gainMetaParameter`](/documentation/PHASE/PHASEMixer/gainMetaParameter)

A parameter that changes the mixer’s volume gradually over a period of time.

### Retrieving the Mixer Identifier

[`identifier`](/documentation/PHASE/PHASEMixer/identifier)

A unique name for the mixer.

## Relationships

### Inherits From

[`NSObject-swift.class`](/documentation/ObjectiveC/NSObject-swift.class)

### Conforms To

[`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible)

[`CVarArg`](/documentation/Swift/CVarArg)

[`CustomDebugStringConvertible`](/documentation/Swift/CustomDebugStringConvertible)

[`Equatable`](/documentation/Swift/Equatable)

[`NSObjectProtocol`](/documentation/ObjectiveC/NSObjectProtocol)

[`Hashable`](/documentation/Swift/Hashable)

---

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