[ydl-gen] mp3 player

[rev rob]

Hello again all
  Thanks to everyone for there wonderful help with my last trouble
with the USB drive.
 I have a new question about mp3 files. Are there any linux gui apps
usable with ydl that will play mp3 files? I have installed mpg123 but
am confused with the correct usage of  the command line. Also, I'd
really just like a GUI mp3 player. I realise there are issues with
patents and licenses concerning mp3's but is that over yet?

     TIA
        rob