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musical instrument digital interface

musical instrument digital interface in Technology
music, hardware, protocol, file format
(MIDI /mi'-dee/, /mee'-dee/) A hardware specification and protocol used to communicate note and effect information between synthesisers, computers, music keyboards, controllers, and other electronic music devices. It is basically a high-speed serial connection with separate connections for MIDI in, MIDI out and MIDI through (to allow devices to be chained).
The basic unit of information is a "note on/off" event which includes a note number (pitch) and key velocity (loudness). There are many other message types for events such as pitch bend, patch changes and synthesizer-specific events for loading new patches etc.
There is a file format for expressing MIDI data which is like a dump of data sent over a MIDI port.
The MIME type "audio/midi" isn't actually registered so it should probably be "audio/x-midi".
Filename extension: .mid or .midi
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The Free On-line Dictionary of Computing, © Denis Howe 2010
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