Apple Motion 4 - Manual (Page 1345)

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Position the pointer over the number in either the In or Out field, and the drag pointer
appears. Drag left to increase the value, or drag right to decrease the value.
The trimmed area
appears highlighted in
green.
Scrubbing an Audio Track
You can scrub an audio track in the Audio Editor to hear a portion of the track. Use the
Audio Scrubbing button to turn scrubbing on or off. Scrubbing is turned on by default
in the Audio Editor (it is off by default in the Timeline).
To scrub an audio track
1 In the Audio tab, select the track.
2 If scrubbing is turned off, click the Audio Scrubbing button, located at the lower-left
corner of the Audio Editor, to turn on scrubbing.
3 Drag the playhead in the Audio Editor left or right. Keep the pointer still to loop
continuously on the frames adjacent to the current frame.
Note: By default, audio scrubbing loops continuously on the five frames adjacent to the
current frame when you keep the pointer still. You can turn off looping by choosing
Motion > Preferences, clicking the Project icon, then deselecting the “Loop audio while
scrubbing” checkbox under Playback Control.
You can also scrub audio in the Timeline or Keyframe by Option-dragging in the ruler at
the top of the Timeline. You can scrub audio in the mini-Timeline by Option-dragging
the playhead in the mini-Timeline.
Keyframing Level and Pan Changes
Each audio track has curves for both level and pan, and you can add and edit keyframes
to automate level and pan changes over time. This lets you create fade-ins and fade-outs,
drop audio levels for voiceovers and other sound effects, and eliminate clipping. You edit
the curves directly on the audio waveform in the Audio Editor, allowing you to make
accurate edits.
1345 Chapter 20 Working with Audio