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Leopard Reference: 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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Apple Core Audio Format Specification 1.0 (HTML) (PDF)
Specifies the Apple Core Audio Format (CAF) for audio files.
2006-03-08
Audio Codec Services Reference (HTML) (PDF)
Describes the programming interface for configuring audio codecs and for encoding and decoding audio data.
2007-10-31
Audio File Services Reference (HTML) (PDF)
Describes a C programming interface for reading and writing audio files.
2008-07-08
Audio File Stream Services Reference (HTML) (PDF)
Describes the interface for reading non-random access audio file streams.
2008-10-15
Audio Queue Services Reference (HTML) (PDF)
Describes a high-level programming interface for recording and playing back audio data.
2008-07-08
Audio Toolbox Framework Reference (HTML)
Describes the Core Audio API to access audio files and convert between linear PCM and compressed audio formats.
2006-11-07
Core Audio Data Types Reference (HTML) (PDF)
Describes data types and constants used throughout Core Audio.
2008-11-19
Core Audio Framework Reference (HTML)
Describes a C API that interfaces with audio hardware and includes data types used throughout Core Audio.
2006-11-07
Core Audio Glossary (HTML) (PDF)
Defines general digital audio terms as well as terms specific to Apple's Core Audio technology.
2008-07-07
Core MIDI Framework Reference (HTML)
Describes a C API for Mac OS X MIDI system services.
2008-04-08
Core MIDI Server Framework Reference (HTML)
Describes the Mac OS X MIDI driver interface.
2008-04-08
Extended Audio File Services Reference (HTML) (PDF)
Describes an interface for reading and writing audio files with automatic format conversion.
2008-09-09