On a music CD you purchased for playing on the stereo, the default format of music files is CDA (sometimes referred to as cdda). If you made a music CD from the computer from some WAV or MP3 files, most CD-burning programs these days will automatically try to convert them to something the stereo can play as well ( CDA usually). If you have CDs you make and you want to specify not to convert the files to some other format before burning them (maybe because you like the default player for those kinds of files, or your standalone DVD player can also do WAV or MP3 files too), try making a Data CD instead of a Music CD when burning them.
I just loaded my old burning software onto my new computer and it burns the music as cda not wav files. The cd won't play in my home stereo and sounds scatchy in the car. I did not encounter this problem when this software was used on my older computer.