Owner's manual

Logic Pro can be synchronized with external hardware and software via a number of

different synchronization protocols. In this chapter, you’ll take a detailed look at these

protocols.

This chapter covers the following:

• Understanding the Synchronization Protocols (p. 1187)

• The Synchronization Master and Slave Relationship (p. 1188)

• Using External Synchronization (p. 1188)

• Displaying and Using SMPTE Positions (p. 1190)

• MIDI Machine Control (p. 1192)

• Synchronization Problems and Solutions (p. 1194)

Understanding the Synchronization Protocols

Logic Pro supports the following synchronization protocols:

• MIDI Time Code (MTC): Translation of a SMPTE time code signal into a MIDI standard

time code signal.

• MIDI Clock: Short MIDI message for clock signals. It is used to provide a timing pulse

between MIDI devices. Logic Pro can send MIDI Clock signals to synchronize external

devices. It cannot receive MIDI Clock synchronization signals.

• SMPTE time code: An audio signal that is translated into MTC by some MIDI interfaces,

such as the Unitor8.

• Word Clock: This is a signal that is carried by all digital audio interface formats (ADAT,

FireWire Audio, S/P-DIF, AES-EBU, T-DIF). It is used to maintain the timing integrity of

sample words in audio signals that are transmitted digitally between Logic Pro and

external hardware or software.

• ReWire: Logic Pro can act as a ReWire host. It acts as the master synchronization source

for ReWire-enabled applications such as Reason and Ableton Live. This chapter does

not cover the use of Logic Pro as a ReWire host (see Working with ReWire Applications).

1187

Synchronizing Logic Pro