audio cd's can't be mounted AFAIK
u can just open a ripper program like Grip (or whatever u like the most) and it will find the tracks, and then u can rip them
or... <shameless kde plug> if u use KDE3 u could insert the cd, type audiocd:/ in the location bar and u'll be pleasantly surprised
u can just copy the wav files from it that way or even have it rip it to mp3 or ogg if u want </shameless kde plug>