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MIDI beat clock, or simply MIDI clock, is a clock signal that is broadcast via MIDI to ensure that several MIDI-enabled devices such as a synthesizer or music sequencer stay in synchronization. Clock events are sent at a rate of 24 pulses per quarter note .
A sequencer can drive a MIDI system with its internal clock, but when a system contains multiple sequencers, they must synchronize to a common clock. MIDI timecode (MTC), developed by Digidesign, [122] implements SysEx messages [123] developed specifically for timing purposes, and can translate to and from the SMPTE timecode standard.
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These include a large, very granular tempo slider similar to the sliders found on a modern phonograph and 'push' and 'hold' buttons that permit temporarily slowing down or speeding up the beat clock. It can also transmit MIDI Machine Control and MIDI beat clock , and slave to external beat clock sources such as other Roland grooveboxes.
The main MIDI standard specifies abstract communications protocol for synthesizers, dealing with how to transmit note numbers and controllers, but not what they mean.More standards were created afterwards to state correspondence of particular sounds and sound effects to particular numbers transmitted.
Its contents were merged into MIDI beat clock. The original page is now a redirect to this page. The original page is now a redirect to this page. For the contribution history and old versions of the redirected article, please see its history ; for its talk page, see here .
MIDI's tempo map specifies the speed at which a file's events are transmitted within this framework: their tempo. If a file plays at a fixed tempo, its map is a horizontal line (e.g., measures 38 and 39 in this part of a MIDI sequencer ’s display of the end of J.S. Bach's prelude #8 from Book I of the Well-tempered Clavier ):
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