Apple Motion 4 - Manual (Page 1344)

Note: You can also show and slip the timebar for an audio track in the Timeline. To display
audio in the Timeline, click the Show/Hide Audio button in the display options (located
in the lower section of the Timeline layers list).
Trimming Audio Tracks
You can edit the start and end points of an audio track to cut down the length of the
audio in the track, or to have it start or end at a specific point in time. This is called
“trimming” the track. Motion lets you trim audio tracks, either visually or by entering
numeric values for the In and Out points.
When you trim an audio track, the audible part of the track is highlighted in green in the
Audio Editor. Trimming an audio track is nondestructive and does not affect the original
audio file.
To trim an audio track visually
1 In the Audio tab, select the audio file you want to trim.
The track’s timebar appears in the Audio Editor and in the mini-Timeline.
2 In the Audio Editor or the mini-Timeline, position the pointer over the beginning or end
of the timebar, and the trim pointer appears.
Trim pointer
3 Drag the beginning or end of the timebar to the point where you want to set the In or
Out point for the file.
The progress of your trim is displayed in the Audio Editor and lets you see the time
markers, so you can trim more precisely.
To trim an audio track numerically
Do one of the following:
µ
In the Audio Editor, type a value in the In field where you want the track to begin, or type
a value in the Out field where you want the track to end.
µ
Click the arrow at the left edge of the field to decrease the value, or click the arrow at the
right edge of the field to increase the value. Shift-click to move in increments of 10.
1344 Chapter 20 Working with Audio