Apple Logic Pro 9 - Manual (Page 1188)

Tip: Logic Pro also supports manual or “human” sync, when slaved. This is not a
synchronization protocol per se, but enables Logic Pro to follow tempo changes in real
time. As an example, it could chase a live drummer. See
Using the Tempo Interpreter
Window .
The Synchronization Master and Slave Relationship
In all synchronization situations, regardless of the simplicity or complexity of your studio
configuration, the following rules apply:
• There can only be one synchronization master.
• The synchronization master sends time code information (synchronization signals) to
one or more synchronization slaves.
Logic Pro is capable of acting as master or slave, as are many devices.
Important: In many (if not most) cases, you will need to manually set each
synchronization-capable device—including Logic Pro itself—to act as master or slave. If
you don’t do this, there will be multiple master devices in your system, which will result
in synchronization errors.
Using External Synchronization
When you first open Logic Pro, manual synchronization mode is automatically turned off,
and Logic Pro is in Internal Sync (master) mode. Activating the Transport bar’s Sync button
synchronizes Logic Pro to the chosen synchronization source.
If Logic Pro is running by itself (no devices or applications capable of synchronization are
in use), or is acting as the synchronization source, it is the synchronization master device.
In this situation, the Transport bar’s Sync button should not be activated.
The Transport bar Sync button is not displayed by default.
To view the Transport bar Sync button
1 Control-click the Transport bar, then choose Customize Transport Bar from the shortcut
menu.
2 Select the Sync checkbox toward the bottom of the Modes and Functions column (right
column), and click OK.
1188 Chapter 40 Synchronizing Logic Pro