External synchronization in Logic Pro for Mac
When you first open Logic Pro for Mac, it is in Internal Sync (transmitter) mode. The control bar Sync button, if visible, is not activated.
When Logic Pro is receiving synchronization, the control bar Sync button is activated.
You can use the Sync button to turn external synchronization on or off at any time, without changing the selected synchronization source. This allows you to temporarily stop Logic Pro from receiving synchronization from an external device. This could prove useful, for example, if you need to quickly edit a MIDI region while the external synchronization source—tape machine, VTR, and so on—is still running.
You can use the Sync button shortcut menu to choose a synchronization source.
Note: The control bar Sync button is not displayed by default.
