[Zubersoft]

Yes, you do need to enter the duration for each song, as the duration would be different for every song. There isn't an option to tie together that duration with the total combined duration of all audio tracks in the song. That would be a separate feature I would have to add. 

If you want the scrolling to switch between songs, then enable the option I mentioned (Scroll continuously between songs in setlists). Then you should get a continuous scroll without any delay.

Mike