Turn music off?

Hey I just want to turn the music off and play my own from my computer, but I can't  figure out how.  The in game audio settings give you no control over the balences other than a few presets none of which is a music off mode.  Under the costomization menu there is a place to make your own playlist but not an option to turn it off.  I even went through and deselected every song but this did nothing. So... am I an idiot or is this the first game I've played since roller coaster tycoon that doesnt have the option to turn the music off.