Apple Final Cut Express HD: Getting Started - Manual (Page 67)

Chapter 4 Basic Editing 67
Disconnecting Source and Destination Controls
Destination tracks can be disconnected in order to omit the video or audio portion of a clip
when it’s edited into a sequence. For example, if you disconnect the video Source control
prior to making an edit, only the audio portion of the clip is edited into the Timeline.
Disconnected Source controls remain disconnected even when you open a clip into the
Viewer consisting of a different number of video and audio items than the previously
opened clip contained.
To disconnect a destination track in the Timeline:
m Click the Source control or the Destination control to break the track assignment.
Important: If a track is locked, that track is also ignored as a destination track.
Before
disconnecting
tracks
Disconnected
source tracks