gnaural : A programmable binaural-beat generator, implementing the principle of binaural beats as described in the October 1973 Scientific American article "Auditory Beats in the Brain" (Gerald Oster). ( http://gnaural.sourceforge.net/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a luke-jr
For Paludis use this rsync : rsync://gentoo.zugaina.org/luke-jr-portage
If you have a problem : ycarus(-at-)zugaina.org