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).

Declaration

@interface AUParameterTree : AUParameterGroup

Overview

The parameter tree is KVO-compliant. An audio unit may choose to dynamically rearrange the tree; when doing so, it must issue a KVO notification on the audio unit’s parameterTree property.

Topics

Obtaining Tree Parameters

- parameterWithAddress:

Searches the tree for a parameter with a specific address.

- parameterWithID:scope:element:

Searches the tree for a specific version 2 audio unit parameter.

Audio Unit Implementations

These methods are only of interest to audio unit subclasses.

+ createGroupWithIdentifier:name:children:

Creates a parameter group object.

+ createGroupTemplate:

Creates a template group which may be used as a prototype for further group instances.

+ createGroupFromTemplate:identifier:name:addressOffset:

Initializes a group as a copied instance of a template group.

+ createTreeWithChildren:

Creates a parameter tree object.

Relationships

Inherits From

Conforms To

See Also

Audio Unit v3

AUAudioUnit

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

AUAudioUnitBus

The AUAudioUnitBus class defines an input or output connection point on 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

An AUParameterGroup object represents a group of related audio unit parameters. A parameter group is KVC-compliant for its children.

AUParameterNode

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

AUAudioUnitFactory

Implement this protocol to create a version 3 audio unit.

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