You may want to play one song throughout a slideshow continuously. If you like an audio track very much, and the track is not long enough to match up to the slideshow duration, you may need to loop the same music from the beginning of the slideshow to the end.
Make one song play continuously in a slideshow
1.Launch DVD Photo Slideshow, import your photos and add kinds of slideshow effects, such as transitions, pan&zoom effects, text and subtitles.
2. Click “Add” under tab “Transition& Music” to add the song you want to use in your slideshow from your computer.
3.Check “Loop Audio” too make the song play repeatedly.