Hi Donny,
This is a great feature I am really interested in.
I already use some audio for Multi pads, but would like to use more...
Just gotta find a good website where I can download them.
Great for Dance (EDM) music for example.
You can also play the intro of any song as audio first, so the audience can recognize the song right away and then continue with a generic style.
The possibilities are endless ...

Check this one out for example:
http://prostylemusic.net/item/party-rock-anthem-sx70-t45
Style and Audio ...
Even though I would prefer to sing if I can ....

Eric