Howtoforge published a guide about converting songs from an Audio CD into MP3/Ogg Files with K3b under Linux
How To Convert Songs From An Audio CD Into MP3/Ogg Files With K3b
This guide describes how you can use the CD/DVD burning application K3b to convert songs from an audio CD into MP3 or Ogg files that you can use on your MP3 player, for example (if you choose the Ogg format, your MP3 player must support it).
How To Convert Songs From An Audio CD Into MP3/Ogg Files With K3b