Audio backing

Can you attach a backing audio track to play with your song slides or does this software assume that you have musicians?

You can attach tracks to cues, no problem.  When editing a cue, go to the bottom and you'll see the "Audio" panel.  You can select an audio file from your media library there.  It will play when you fire the cue.

Thanks Adam, it's obvious now that you've told me.  Very intuitive.