Document Revision History

This table describes the changes to Audio Unit Properties Reference.

DateNotes
2012-12-13Clarified 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.