Apple Final Cut Pro 7 - Manual (Page 89)

Chapter 4 Working with the Canvas and Timeline 89
Place only the audio portion of a clip in a sequence:
Click the a1 and a2 Source controls for the audio tracks again to reconnect them to their
1
Destination controls. This allows the audio portion of a clip to be placed in the sequence.
Click the v1 Source control to disconnect it from the V1 Destination control.
2
Disconnected
v1 Source control
Press the End key to move the playhead to the end of the sequence. 3
Drag Sample Clip 1 from the Viewer to the Overwrite section of the Canvas Edit Overlay 4
to see that only the clip’s audio is placed in the Timeline.