You can try going with konqueror to audiocd:/ to browse it.
If it can be mounted with iso9660 it's probably burned as a data cd and not an audio cd.

And I am wondering how grip and other CD-rippers are able to detect the cd audio track. Does anybody have got some clues?
An audio cd is just raw data with some bits telling where a track starts and ends.

http://www.tldp.org/LDP/intro-linux/...ect_07_04.html