Apple Final Cut Express HD - Manual (Page 401)

Chapter 29 Linking and Editing Video and Audio in Sync 401
VI
Understanding Sync Relationships Between Multiple
Linked Audio Items
Up to 24 audio items can be linked to a single video item in the Timeline. As a result,
some complex sync relationships may result if you slip more than one of a clip’s audio
items (for information on slip edits, see “
Slipping Clips in the Timeline ” on page 457).
These are easily managed using the same out-of-sync indicators described earlier.
When you link multiple items together in the Timeline, the video item is considered the
anchor item to which the sync of all other linked audio items is compared. If you’re
linking audio clip items without a video item, then the topmost audio item in the
Timeline acts as the anchor item.
In the following example, three stereo pairs of audio items are linked to a single video item.
Moving a single pair of items out of sync results in a single out-of-sync duration, with out-
of-sync indicators with positive and negative durations in both the video and audio items.