Apple Final Cut Pro X (10.0.9) - Manual (Page 183)

Chapter 9 Edit audio 183
Example: Make a roll edit to all audio components
1 Select a clip in the Timeline, and choose Clip > Expand Audio Components (or press
Option-Control-S).
Audio components
2 Position the pointer at the edge of the audio portion of the clip you want to roll.
The pointer changes to the Trim tool icon .
3 Hold down the Shift key and drag to roll back the edit point for the audio portion of the clip.
The edit point is rolled to the new location, cutting the audio at the end of the clip. The video
portion of the clip is not affected.
To undo your edit, press Command-Z.
4 Play back the clip to listen to your adjustments.
5 To collapse the audio components after you complete your adjustments, choose Clip > Collapse
Audio Components (or press Option-Control-S).