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Leopard Technical Notes: Audio
Core Audio and Core MIDI are the Mac OS X audio and MIDI subsystems. Core Audio provides a hardware abstraction layer, an effects processing framework, data format conversion routines, and other services. Core MIDI provides a hardware abstraction layer and MIDI routing.

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Optimizing Audio Unit User Experience in Logic Studio (HTML)
TN2207: How to provide the best user experience with your audio unit in Logic Studio
2009-04-23
Audio Export - Encoding AAC Audio For MPEG-4 Export (HTML)
TN2237: The QT MPEG4 Exporter does not show all options for generating AAC, this TN discusses workarounds.
2009-01-27
Audio Unit Validation Using the auval Tool (HTML)
TN2204: Test the conformance of audio units to Audio Unit Services.
2008-09-08
Audio Units: Embedding a Carbon View in a Cocoa Window (HTML)
TN2213: Carbon-Cocoa Integration for Audio Units
2008-02-29
The Sonogram View Demo Audio Unit (HTML)
TN2200: Describes the advanced audio unit features that the associated sample project demonstrates.
2007-11-07
Using AudioDeviceRead in Mac OS 10.4 (HTML)
TN2113: How to use AudioBufferLists with AudioDeviceRead in Tiger and beyond.
2006-11-29
Playing a sound file using the Default Output Audio Unit (HTML)
TN2097: Playing an Audio File using the Default Output Audio Unit
2006-11-15
Device input using the HAL Output Audio Unit (HTML)
TN2091: How to get input from an audio device by using the HAL's Output Audio Unit.
2006-07-25
Handling Audio Unit Events (HTML)
TN2104: This technote explains how to handle AudioUnit Events
2005-04-29
The System Sound APIs for Mac OS X 10.2, 10.3 and later (HTML)
TN2102: Discusses the System Sound APIs for correctly playing Alerts and User Interface Sound Effects
2004-07-13
Using the 3DMixer Audio Unit (HTML)
TN2112: Discusses how to use Core Audio's 3DMixer version 2.0
2004-06-14