This window shows each of the sounds contained in the movie, and allows you to mute, change the volume or delete each individual one.
How to show the Soundtracks Window:
On the Edit main menu, select Sound Tracks.
Or
Click the button on the Edit toolbar.
In addition to allowing you to alter volume or delete a sound, the Soundtracks window also allows you to save any of the sounds contained in a movie as separate sound files. To do this, simply select the sound you want to save and click the Save to file button.