Document Revision History

This table describes the changes to Audio Unit Component Services Reference.


Added descriptions for “Generator Audio Unit Subtypes.”


Added descriptions for “Music Instrument Audio Unit Subtypes.”


Added descriptions for new audio unit subtypes in “Effect Audio Unit Subtypes.”


Added memory management information for the AudioUnitGetProperty function.


Added descriptions for several previously undocumented data types and constants.


Updated for iPhone OS 3.0.


Added an “Callbacks” chapter. Added and improved API descriptions throughout document.


For iPhone OS, improved description of kAudioUnitSubType_VoiceProcessingIO constant.

2008-09-09Updated for iOS version 2.1.
2008-07-08New document that describes a C API for initializing and using audio units.