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Audio Unit Framework Reference Audio Unit Properties Reference

Document Revision History

This table describes the changes to Audio Unit Properties Reference.

Date

Notes

2012-12-13

Clarified discussion of voice processing I/O audio unit properties.

2010-12-16

Added descriptions of new APIs for iOS 4.3: AudioUnitParameterHistoryInfo, kAudioUnitParameterFlag_PlotHistory, and kAudioUnitProperty_ParameterHistoryInfo.


Added descriptions of additional Voice-Processing I/O unit APIs: VoiceIOFarEndVersionInfo, kAUVoiceIOProperty_FarEndVersionInfo, kVoiceIOFarEndAUVersion_RequiresBackwardCompatibility, and kVoiceIOFarEndAUVersion_ThirdParty.

2010-08-03

Improved descriptions for the kAudioUnitProperty_MaximumFramesPerSlice and kAudioUnitProperty_StreamFormat properties.


Additional minor improvements.

2010-07-09

Added descriptions for the kAUVoiceIOProperty_VoiceProcessingQuality and kAUVoiceIOProperty_MuteOutput properties.


Clarified the description of the kAudioOutputUnitProperty_EnableIO property.


Added descriptions for the constants in Mixer Audio Unit Properties.


Added descriptions for the constants in Offline Audio Unit Properties.


Added information on memory management to several properties: kAudioUnitProperty_ClassInfo, kAudioUnitProperty_ElementName, kAudioUnitProperty_PresentPreset, kAudioUnitProperty_ParameterValueStrings, kAudioUnitProperty_FactoryPresets, kAudioUnitProperty_PreflightName.

2009-06-26

Updated for iOS 3.0.


Improved description of AudioUnitParameterNameInfo. Added descriptions for constants in Voice-Processing I/O Audio Unit Properties enumeration.

2008-09-09

Updated for iOS 2.1. Improved formatting for declarations.

2008-07-08

New document that describes the audio unit properties in iOS and OS X.