10.6

Table Of Contents
995Logic Pro User Guide
Synchronization problems and solutions in Logic Pro
Due to the number of synchronization types available, and different implementations
by various manufacturers, you may experience timing issues when using Logic Pro
synchronously with other devices or apps. This table describes common synchronization
problems and solutions.
Problem Solution
Digital synchronization error If Logic Pro is synchronized to external word clock (Audio Sync
Mode:External or Free), make sure that a valid digital signal is always
available.
If you see a “Sample Rate xxxkHz recognized” error message, the clock
source device (DAT machine, for example) connected to your audio
hardware’s digital input may not transmit Word Clock in stop or pause
mode (or has switched itself off).
Poor or no synchronization to an
external tape machine
Create a new project, then make a new recording in Logic Pro of the audio
on tape.
If an old recording on tape was not properly synchronized to timecode,
you won’t be able to use it. When trying to synchronize to tape, there is
one key rule:the playback situation must be identical to the recording
situation.
MIDI and audio are not synchronized Open the File > Project Settings > Synchronization > Audio pane and
choose MTC Continuous or MTC Trigger + Auto Speed Detection mode in
the Core Audio pop-up menu.
If your audio hardware doesn’t support either mode, you should cut
extremely long regions into shorter sections.
MIDI and SMPTE are not
synchronized
Check all frame rate settings. The frame rates of all connected devices
must be identical, including the timecode on the tape machine, the
synchronizer, and Logic Pro itself.
Some synchronizers encode the wrong frame rate in MTC. In this situation,
open the Tempo Editor, turn off the Detect option, and set the correct
frame rate manually.