The Compact command deletes unused portions of audio files to conserve disk space, and to prepare for cleaner hard drive back-ups. The
Compact Selected command also deletes any audio files for which there are no clips on tracks referencing those files.
Because it permanently deletes audio data, the Compact command should be used only after you have completely finished your editing and are sure that you have no further use for the unused audio data.
The Compact command can
pad the clips of the compacted file by a selectable amount. If clips in your session use crossfades, or if you want to pad the clips for the sake of any future trimming, you should enter an appropriate amount of padding (in milliseconds).
Once the Compact command has been completed, the session is saved automatically.