gtk123 is a frontend for mpg123, mpg321, and other
mp3 players that use the same command-line format.
It should be possible to use gtk123 in situations
where most other MP3 players would be ineffective
due to lack of CPU power. gtk123 is being
developed and tested on a 486DX4/75 laptop. On
such a system, it can be somewhat unresponsive
when decoding VBR, but CBR works well (at least in
mono mode).