If you are referring to the media as a CDR (CD recordable), they will work as long as the file formats used are compatible. Even CDRW (CD re-writeable) disks will work in most players. You just need to use a program or app that allows to burn an audio CD. That should work and do the file conversion for you. File formats like MP3 usually won’t play in most players unless they specifically can play the MP3 format.