Description:

Quod Libet is a GTK+-based audio player written in Python. It's designed
around the idea that you know better than we do how to organize your music.
It lets you make playlists based on regular expressions (don't worry,
regular searches work too). It lets you display and edit any tags you want
in the file. And it lets you do this for all the file formats it supports --
Ogg Vorbis, FLAC, MP3, Musepack, and MOD.

Quod Libet easily scales to libraries of thousands of songs. It also supports
most of the features you expect from a modern media player, like Unicode
support, gapless playback, multimedia keys, and an OSD.