Joined: May 2009
Posts: 590
background
8/22/2018 at 10:30 AM
My suggestion if you are wanting to play multiple tracks through the entire presentation would be to install Audacity
;free software, add the tracks you want there and merge them into one file.
You can add different audio tracks for an individual slide too if that will work, but only one track can be added to play in the background.