5

To scrub an audio track
µ
Hold the Option key down while dragging the playhead right or left in the mini-Timeline
or Audio Timeline.
µ
Pausing the pointer in the middle of a drag while holding the Option key down loops
the five frames adjacent to the current frame.
Note: Audio looping while scrubbing is turned on by default. You can turn off looping
by choosing Motion > Preferences, clicking the Time icon, then deselecting the “Loop
audio while scrubbing” checkbox.
Keyframing Level and Pan Changes
Each audio track has curves for 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.
For more information about using keyframes and editing curves, see Keyframes and
Curves
Recording Keyframes
You can record keyframes for audio level and pan by clicking the Record button, then
adjusting the dials or sliders in the Audio list, the HUD, or the Inspector. Alternatively,
you can manually add a keyframe to the Level and Pan parameters in the Audio Track
Inspector (any subsequent adjustments add a keyframe at the current playhead position).
Recording keyframes for audio level and pan can be useful for trying out changes and
hearing the results in real time.
Adding and Editing Keyframes
Level and Pan curves appear in both the Audio Timeline and Keyframe Editor.
• Audio keyframes in the Audio Timeline appear as a flat sequence, allowing you to move
their positions in time or delete them, or edit their values numerically.
• Audio keyframes in the Keyframe Editor appear stacked, forming curves. To show the
audio waveform behind the curve, choose the track name from the waveform pop-up
menu on the upper-right side of the Keyframe Editor.
The Level and Pan parameters are adjusted via different numeric ranges:
• Level curves range from –96 to 6 with 0 equivalent to 0 dB (unity gain).
• Pan curves range from –100 to 100.
Because Level and Pan curves each use a different scale, it can be difficult to frame them
at the same time in the Keyframe Editor.
1378 Chapter 23 Working with Audio