Regarding the feature of using audio link multipads, I use it often, I do not use it to play the entire song necessarily, mostly a recurring musical phrase as an example, I got the acapella of Michael Jackson on the song "The way you make me feel" , I used an Audio program to trim the part I want to use (Can use Audacity, Sound Forgue, etc) and then I made a multipad audio link with that phrase and assigned to a registration so, I use other registrations of the same bank while I am playing the song, and when the time for that part, I change the registration that has that phrase and of course in sync....
Works like a charm.....!!!!

There are many songs that have a recurring verse or so....you can use it then.
Just need to be creative.

My 2 cents.

Manuel