Tried everything, cannot make Exaile play MP3 songs from CD. Nothing plays

Suggestions welcome. Beg your pardon, if I have ovelooked the obvious
First of all, if you did a full installation (which you should have, a basic installation is for advanced users and clearly you are not one), the codecs installer is already installed, and since it is already installed, you couldn't possibly have installed it yourself, command line or not.san2ban wrote:gapan
I have installed whatever was in the .iso file, and updated regularly. I have not installed the codecs separately
I installed the codecs installer, from the command line.
Still, Exaile throws the same message