Apple Motion 4 - Manual (Page 1348)

Note: When retiming video, audio attached to the footage is automatically retimed along
with it. You can unlink video and audio to retime them separately. For more information
on retiming footage, see
Retiming .
Timing Controls in the Inspector
Each audio object has individual timing parameters in the Properties tab.
Speed: Sets the speed of the audio clip as a percentage. The default is 100%. Values
lower than 100 play back the audio clip more slowly than its original speed, and also
extend the Duration of the audio clip. Values higher than 100 play back the audio clip
faster than its original speed, and shorten the Duration of the audio clip.
In: Sets the In point of the audio clip. Adjusting this parameter always moves the audio
clip In point to the specified frame without affecting its duration.
Out: Sets the Out point of the audio clip. Adjusting this parameter always moves the
audio clip Out point to the specified frame without affecting its duration.
Duration: Sets the total duration of the audio clip. Adjusting Duration will also affect the
Speed and the Out point.
End Condition: Sets how playback continues when the end of the audio clip is reached.
This pop-up menu has four options:
• None: The default setting. The audio clip’s duration in your project is equal to the
duration of its source media file.
• Loop: When the last frame of the audio clip is reached, it loops back to the first frame
and plays again. This can cause a jump in the audio clip’s apparent playback unless it
was designed to be looped seamlessly. The End Duration value must be greater than
0 for this parameter to have any effect.
• Ping-Pong: When the last frame of the audio clip is reached, the next iteration of clip
playback is reversed. The End Duration value must be greater than 0 for this parameter
to have any effect.
Note: The Ping-Pong option is mainly for reverence—the “reversed” section of the
audio track will sound noisy, as Motion does not support true reverse playback.
• Hold: With this selected, the audio stops at the loop point.
End Duration: Sets the number of frames by which the clip is extended at the end of its
duration. This value may be adjusted only if End Condition is set to a value other than
None.
Adjusting a Track’s Speed in the Timeline
Motion allows you to change the timing of audio tracks in the Timeline as well.
Important: To affect all channels of a multichannel audio file, select all the tracks in the
Audio tab (press Command-A) before making adjustments in the Timeline.
1348 Chapter 20 Working with Audio