[dubiousSwain]

Hmm...
My first thought would be to check for libraries in labview that have functionality to play WAV files, and have the file as a dependency

Not sure about hooking it up

You might want to check the rules about speakers on the robot, I think I might have read something about it

also I'm not sure what you are trying to achieve, a speaker small enough to fit in your bot wouldn't be audible over the DJ's sound system and the crowd noise