Here is a link to a video of me using vArrager live on a gig. The sound is not all that great but you can see how it works with a controller. I am still using a mouse to select a song on vArranger but I now have a button on the controller setup to go to the next song in the list and the mouse is not needed. I use the iPad for my lead sheets.

https://app.box.com/s/njuhub4zbf6nfb6om9ni

Deane