goattracker : Crossplatform music editor for creating Commodore 64 music ( http://covertbitops.c64.org/ )
milkytracker : FastTracker 2 inspired music tracker ( https://milkytracker.titandemo.org/ )
tagutil : Scriptable music files tags tool and editor ( https://github.com/kaworu/tagutil )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a zerodaysfordays
For Paludis use this rsync : rsync://gentoo.zugaina.org/zerodaysfordays-portage
If you have a problem : ycarus(-at-)zugaina.org