You can cut, copy, and paste audio tracks in the Audio list. You can also duplicate tracks.
In the Audio list, select an audio track, then do one of the following:
Choose Edit > Cut (or press Command-X).
Control-click the track, then choose Cut from the shortcut menu.
In the Audio list, select an audio track, then do one of the following:
Choose Edit > Copy (or press Command-C).
Control-click the track, then choose Copy from the shortcut menu.
In the Audio list, do one of the following:
Choose Edit > Paste (or press Command-V).
Control-click an empty area, then choose Paste from the shortcut menu.
In the Audio list, select an audio track, then do one of the following:
Choose Edit > Duplicate (or press Command-D).
Control-click the track, then choose Duplicate from the shortcut menu.
The duplicate appears below the original file in the Audio list.
There are two ways to remove an audio track from your project.
In the Audio list, do one of the following:
Select an audio track, then press Delete.
Control-click an audio track, then choose Delete from the shortcut menu.
The file is removed from the project.
If you try to delete an audio file with linked video, an alert dialog appears, warning that “One or more linked video objects will also be deleted. Are you sure you want to delete the audio? You can delete just the audio by first unlinking it from the video.”
Note: Deleting an audio track from the Audio list removes the associated file from the Media list if “Automatically manage unused media” is selected in the General pane of Motion Preferences.