The audio section of the slideshow 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 slideshow's audio. You can drag audio files from the Media List on the Media tab to this track.

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.

Unlink Audio

Allows you to separate the video and it's original audio. The audio is then placed in the Narration Track.

Restore Audio

This option will restore the default audio the video originally had.

How to mute native audio from video

To mute a video, right click it in the audio track and choose Adjust Clip Volume. Check the Mute clip box, then click OK.

How to save native audio from video

You can save a video native audio as a separate file by right-clicking the video file in the Media List and choosing Save audio track as a separate file from the context menu.

Trim audio to match length of slideshow

Right click on an audio clip on either the Sound Track or Narration Track, then select Trim audio to match length of slideshow to trim and fade the end of the audio file to match the length of the slides.

Loop this clip until the end of the slideshow

Right click on an audio clip on the Sound Track or Narration Track. Select Loop this clip until the end of the slideshow to repeat the audio clip through the end of the slideshow.