http://www.linuxquestions.org/questi...77#post2824877
... the above thread is a repeat of this question. I take it that you can now play wav files?
RHEL should play wav files out of the box.
up2date contains a program called ffmpeg2theora which will convert mp3 files to ogg/vorbis. Get that and convert your collection today.
Otherwise, use the search function to find out how to install an mp3 player/plugin.