Apple Final Cut Express 4 - Manual (Page 441)

Chapter 30 Linking and Editing Video and Audio in Sync 441
VI
To slip all out-of-sync clip items into sync with the anchor item:
1 In the Timeline, Control-click the out-of-sync indicator on the anchor clip item—either
the sole video item in a group of linked items, or the topmost audio item if there is no
video item among the linked items.
2 Choose Slip Others into Sync from the shortcut menu.
Establishing a Different Sync Relationship
Between Linked Clip Items
There are many reasons you might deliberately edit the video and audio items of a clip
to be out of sync with one another:
 Aligning the visuals of an actor reacting to a voice
 Reediting an actor’s audio from one take to match the visuals of a different take
 Changing the sync of ambient sound behind an image without critical audiovisual
sync points (such as dialogue)
 Performing sophisticated audio edits to sweeten an actor’s dialogue
Before syncing
After syncing