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Leopard Reference: Audio
MIDI, an acronym for Musical Instrument Digital Interface, is a serial data protocol and a related family of file formats. The MIDI protocol consists of time-stamped events, which can include note on/off commands, controller commands (such as sustain pedals and aftertouch), and system-exclusive data. MIDI data can be converted into sound by hardware or software synthesizers. It can also be used to control a wide range of devices ranging from audio mixer and effects unit automation to remotely triggered lighting hardware.
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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
MIDI File Format (HTML)
Describes the QuickTime implementation of the MIDI file standard.
 2002-09-17