User Manual

Understanding Sync Lock
611
There are several unique aspects to sync locking:
• You control sync lock by the Segment Drag Sync Locks option in the Edit tab of the
Timeline Settings dialog and the Sync Lock icons in the Timeline. For more information on
sync locking tracks, see “Maintaining Sync with Segment Edits” on page 700.
• When trimming, sync lock applies only to single-roller trims because dual-roller trims do
not break sync. For more information on sync locking tracks when trimming, see
“Maintaining Sync While Trimming” on page 751.
• You can sync lock any number of tracks in any combination. The tracks do not require
matching timecode or common sources and can include multiple video tracks as well as
audio tracks.
• Sync lock affects entire tracks. This means that parallel segments in other sync-locked tracks
are affected when you add, move, trim, or remove material anywhere in the sequence.
Syncing with Tail Leader
You can add tail leader to the audio or video material to provide a useful visual reference in the
Timeline for tracking and fixing sync breaks across any number of tracks.
Film editors traditionally use standard head and tail leaders for this purpose. You can create your
own leader according to any specification, as described in “Creating Video and Audio Leaders”
on page 622.
With tail leader added to synchronized tracks, you can go to the end of the sequence after you
make a complicated edit and see if the leaders line up. If they are out of line, this indicates a sync
break that you can eliminate.
To eliminate a sync break when the leaders do not line up:
1. Move the position indicator to the black segment that follows the out-of-sync leader.
2. Select the track, and then click the Mark Clip button. You can measure the break by
checking the In to Out duration of the marked segment.
3. Find the point at which the sync was lost.
4. Use the appropriate edit function to add or remove frames, as described in “Fixing Sync
Breaks” on page 610.
5. (Option) For a quick fix, click the Segment insert (yellow arrow) button. Drag the black
segment at the end of the out-of-sync tail leader to the location where the sync was lost.
This segment of black, created when the track went out of sync, is the exact length of the
sync break.