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MIDI Beat Clock

MIDI Beat Clock is a way of synching the tempos of different midi hardware and/or software. It runs at a rate of 24 ppqn (pulses per quarter note). MIDI Beat Clock messages can include tempo change information , whereas MIDI Timecode runs at a constant rate. MIDI Beat Clock only sends start, stop, and rate messages but does not send location information.

MIDI Beat Clock can be used to sync a drum machine to Digital Performer, or sync programs like ReBirth to Digital Performer. MIDI Beat Clock is also known as Realtime Clock.