Apple Final Cut Pro 5 - Manual (Page 1467)

116 Part I Media and Project Management
 If you selected clips in the Timeline, markers appear in both the Timeline and Canvas.
You can clear audio peak markers that were previously added, if you like.
To clear all audio peak markers in a clip:
1 Select one or more clips in the Browser or Timeline.
2 Choose Mark > Audio Peaks > Clear.
For a clip in a sequence,
markers appear here in
the Timeline.