Chapter 23
Synchronization and ReWire
23.1 Synchronizing via MIDI
The MIDI protocol denes two ways to synchronize sequencers, both of which are supported
by Live. Both protocols work with the notion of a sync master, which delivers a sync signal
that is tracked by the sync slave(s).
MIDI Clock. MIDI Clock works like a metronome ticking at a fast rate. The rate of the
incoming ticks is tempo-dependent: Changing the tempo at the sync master (e.g., a
drum machine) will cause the slave to follow the change. The MIDI Clock protocol also
provides messages that indicate the song position. With respect to MIDI Clock, Live
can act as both a MIDI sync master and slave.
MIDI Timecode. MIDI Timecode is the MIDI version of the SMPTE protocol, the
standard means of synchronizing tape machines and computers in the audio and
lm industry. A MIDI Timecode message species a time in seconds and frames
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