These ebuilds come from http://proaudio.tuxfamily.org/wiki.
If you have some problems, go to the official site first.
rt-exec : Test the deterministic/real-time capabilities of your computer. ( ftp://ftp.compro.net/public/rt-exec )
rtirq : Change the realtime scheduling policy and priority of relevant system driver IRQ handlers ( http://www.rncbc.org/jack/ )
set_rlimits : Give unpriviledged users access to realtime scheduling ( http://www.physics.adelaide.edu.au/~jwoithe )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a pro-audio
For Paludis use this rsync : rsync://gentoo.zugaina.org/pro-audio-portage
If you have a problem : ycarus(-at-)zugaina.org