Hey, interesting thing about the muzak players is that they definitely play regular cd's, but the DIP switches in the back have to be set correctly. I'm a manager at a resteraunt that uses muzak, and my boss told me that the switches all have to be lined together in a straight row, but he's not sure if it's up or down. I'm not sure if he's right or not? haha, but i'm weary to try it, because my friend told me that muzak cd's use a different frequency laser, and that when you flip the switches, it changes how the cd is read... so I'm kind of hesitant to just start flipping switches.