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System-level Mac OS X services streamline the development process for audio developers, and for application developers who incorporate audio into their products. Core Audio provides native multichannel audio in a manner scalable for future high-resolution formats. The Audio Unit API provides a plug-in architecture for both DSP and for MIDI-based virtual instruments. MIDI services provide multiport MIDI capability.

An introduction to audio development in Mac OS X.   Essential information for developers working with audio in Mac OS X.   C and Objective-C API references organized by framework.
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Audio Device Driver Programming Guide (HTML) (PDF)
Explains how to develop kernel-resident drivers for audio devices.
Hardware & Drivers 2009-03-04
Audio Queue Services Programming Guide (HTML) (PDF)
Describes how to play and record audio using Audio Queue Services.
Carbon, Cocoa, Core Audio 2007-10-31
Audio Unit Programming Guide (HTML) (PDF)
Explains how to use Core Audio frameworks and the Core Audio SDK to create audio units.
Apple Applications, Carbon, Cocoa, Core Audio 2007-10-31
Core Audio Overview (HTML) (PDF)
Provides an overview of Core Audio and its programming interfaces.
Apple Applications, Carbon, Cocoa, Core Audio, Games 2007-01-08
Sound Programming Topics for Cocoa (HTML) (PDF)
Explains how to load and play audio data in Cocoa.
Cocoa 2006-11-07
Performance Overview (HTML) (PDF)
Introduces the factors that determine performance.
Performance 2006-10-03
QuickTime Media Types and Media Handlers Guide (HTML) (PDF)
Describes video, sound, text, time code, and tween media handlers.
QuickTime 2006-01-10
QuickTime Music Architecture Guide (HTML) (PDF)
Explains how to enable synthesizing and playing of sounds and musical sequences.
Carbon, QuickTime 2006-01-10
QuickTime Audio (HTML)
Explains how to enable recording and playback of various audio media.
Carbon, QuickTime 2002-09-17
Slope/Intercept Audio (HTML)
Explains how to store floating point audio data in QuickTime files.
QuickTime 2002-09-17
Standard Sound Dialog Component (HTML)
Describes the QuickTime component that lets the user make audio parameter settings.
Carbon, QuickTime 2002-09-17