Apple Logic Pro 9 - Manual (Page 1213)

Audio Synchronization Settings
Use the parameters in the Audio pane of the Synchronization project settings to keep
your audio and MIDI tracks synchronized.
Current Sync Status Settings
• MTC slider: This real-time display shows the deviation between the incoming MTC and
its nominal frame rate. If the deviation is significant, make sure that the right frame
rate is set in the General pane of the Synchronization project settings. If in doubt, set
the frame rate to 24 fps and select “Auto detect format of MTC.” If the frame rate is
correct, you can use this display to adjust the tape speed of the master machine to the
nominal value (the same speed used when the time code was recorded). Adjust the
varipitch control on the master machine, until the slider is centered.
• Sample Rate slider: This display shows the deviation of the sample rate from its nominal
value. Note that some audio hardware does not allow any variation in the sample rate.
1213 Chapter 43 Project Settings in Logic Pro