Apple Logic Pro 9 - Manual (Page 1194)

• Following an MMC-controlled recording, Logic Pro automatically creates an empty MIDI
region on the tape track. This is to let you know that a recording has taken place on
the tape machine. This applies to all MMC recordings, including those controlled by
the Autopunch function. If you activate several tape tracks (by Shift-clicking), the
corresponding number of regions are created. If a MIDI region with an identical start
point already exists on a tape track, no new MIDI region is created on that track. This
avoids overlapping regions.
• A double stop command sets the project back to the beginning.
The MMC Record buttons also offer you a simple way to arm tracks on your tape machine
with Logic Pro (see
MMC Record Buttons Objects ).
You should finish all MMC-controlled recordings with Stop or Space. Some tape machines
react differently to a series of MMC Record commands. Sometimes, this can result in
Logic Pro showing a track as recording, when the tape is actually playing back (or even
worse, the opposite situation). As such, you should always finish a recording with Stop
or Space, just to be on the safe side.
Synchronization Problems and Solutions
Given the number of different synchronization types that are available, and different
implementations by various manufacturers, you may occasionally encounter timing issues
when running Logic Pro synchronously with other devices or applications. This section
will help you to overcome some common synchronization problems.
Faulty Digital Synchronization
If Logic Pro is synchronized to external Word Clock (Audio Sync Mode: External or Free),
you must ensure that a valid digital signal is always available. If you encounter error
messages such as “Sample Rate xxx kHz recognized” it may be that the DAT recorder (or
whatever clock source you have connected to your audio hardware’s digital input) does
not transmit Word Clock in stop or pause mode (or has switched itself off ).
Faulty Synchronization to an External Tape Machine
Create a new project, make a new recording, and see if that does the trick. Why? If an old
recording on tape was not properly synchronized to time code, you won’t be able to use
it. One basic rule: the playback situation must be identical to the recording situation.
If everything is working fine with the new recording, this means the present setup is OK.
Next, check whether anything has changed in your global setup. Has the frame rate
changed? Has the tape speed changed? If you have changed a 30 fps setting, try variations
such as 30 drop or 29.97.
1194 Chapter 40 Synchronizing Logic Pro