mpg123 has nothing to do with LambdaRogue or Mario Donick, LambdaRogue's creator.
However, it can be used by LambdaRogue to play MP3 files.

On Windows, set the value of the option "MediaPlayer" in lambdarogue.cfg to
"mpg123.exe -q".

On Windows, set the value of the option "MediaPlayer" in lambdarogue.cfg to
"mpg123 -q".


The official site is http://mpg123.org.