Class

AUAudioUnitBus

The AUAudioUnitBus class defines an input or output connection point on an audio unit.

Declaration

@interface AUAudioUnitBus : NSObject

Topics

Bus Methods and Properties

- setFormat:error:

Sets the bus’s audio format.

format

The audio format and channel layout of audio being transferred on the bus.

enabled

Determines whether the bus is active.

name

A name for the bus.

index

The index of this bus in its containing array.

busType

The bus type.

ownerAudioUnit

The audio unit that owns the bus.

supportedChannelLayoutTags

An array of audio channel layout tags.

contextPresentationLatency

Information about latency in the audio unit’s processing context.

Audio Unit Implementations

These methods and properties are only of interest to audio unit subclasses.

- initWithFormat:error:

Initializes a bus object with a specific format.

supportedChannelCounts

An array of numbers indicating the supported number of channels for this bus.

maximumChannelCount

The maximum number of channels supported for this bus.

Relationships

Inherits From

See Also

Audio Unit v3

Hosting Audio Unit Extensions Using the AUv2 API

Update your existing Audio Unit v2 host app to load and use Audio Unit extensions.

Migrating Your Audio Unit Host to the AUv3 API

Update your Audio Unit (AU) host app to take advantage of the new features and capabilities of AUv3.

AUAudioUnit

The AUAudioUnit class defines a host’s interface to an audio unit.

AUAudioUnitBusArray

The AUAudioUnitBusArray class defines a container for an audio unit’s input or output busses.

AUAudioUnitPreset

The AUAudioUnitPreset class describes an interface for custom parameter settings provided by the audio unit developer. These presets often produce a useful sound or starting point.

AUAudioUnitV2Bridge

The AUAudioUnitV2Bridge class wraps a version 2 audio unit in an AUAudioUnit subclass.

AUParameter

An AUParameter object represents a single audio unit parameter.

AUParameterGroup

A parameter group object represents a group of related audio unit parameters.

AUParameterNode

An AUParameterNode object represents a node in an audio unit’s parameter tree. Nodes are instances of either an AUParameter or AUParameterGroup class.

AUParameterTree

An AUParameterTree object is a top-level group node, representing all of an audio unit’s parameters. An audio unit’s parameters are organized into a tree containing groups and parameters (groups may be nested).

AUAudioUnitFactory

Implement this protocol to create a version 3 audio unit.