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MIDI Timing Clock
MIDI timing clock messages are used to synchronize multiple MIDI devices to a single clock transmitter.
The clock is typically provided by a DAW in computer-based setups and a sequencer or drum machine in
hardware-only setups. Dedicated MIDI clock generators are available for more complicated setups that
need tight synchronization, and some devices can convert between MIDI clock, DIN sync, and taps.
How MIDI clock works
MIDI clocks are sent out at regular intervals by a clock transmitter to one or more receivers. The trans-
mitter controls playback and sets the tempo.
The transmitter never tells the receivers the actual tempo. Instead it sends 24 timing clock messages
every quarter note (24 PPQ) and the receivers each calculate the tempo independently.
Start, stop, and continue messages are used to synchronize playback between devices. The transmitter
continues sending timing clocks when it is stopped so that receivers can be ready when playback starts
or continues. A start message will reset playback to the first beat, and a continue message will pick up
where playback left off.
