The Audio Sequence
The audio section of the sequence is divided into two areas, one for your soundtrack and the other for your narration.
The top audio track is called the Soundtrack. This is a dedicated track for your movie's audio. Audio files you add using the Add Media button will be added to the soundtrack.
The second track is called the Narration Track. This track will show any Narrations you have recorded.
Fading
If you have added a movie to your show, any sound it makes will automatically fade if you have a soundtrack playing. Your soundtrack and movie audio will both automatically fade whenever there is a narration playing.
How to mute native audio from video
To mute a video, press the Volume button from the Clip details page. In the Clip volume page that appears, check the box that says Mute clip.
Audio Effects
You can add audio effects to an audio track. Double tap any sound clip on a track to open the "Clip Details" dialog. Tap "Effects" button and select "Track Effects..." from the menu. In the "Effect Chain" dialog, click the "Add" button to add a new effect to your audio track. Use "Remove" button to delete audio effects from the list. Click "OK" to apply chosen effects. Learn more about each effect in Audio Effects