beets : A media library management system for obsessive-compulsive music geeks ( http://beets.radbox.org/ http://pypi.python.org/pypi/beets )
sonata : an elegant GTK 3 client for the Music Player Daemon ( https://github.com/multani/sonata )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a xelnor
For Paludis use this rsync : rsync://gentoo.zugaina.org/xelnor-portage
If you have a problem : ycarus(-at-)zugaina.org