When burning an audio cd both WMP and realplayer recognize a blank cd and go through the burning process. Unfortunately, an error message pops up saying that the cd could not be burned, that there may be a problem with the cd or the drive. The process renders the disk unusable. If you've attempted to burn the cd using realplayer, you may be able to play the cd in the car just know that you won't be able to skip tracks, some of the tracks will stutter and skip like a scratched record and some tracks just won't play at all. I am currently in possession of a stack of shiny but ultimately useless drink coasters.