These ebuilds come from http://github.com/sjnewbury/multilib-overlay.
If you have some problems, go to the official site first.
esound : The Enlightened Sound Daemon ( http://www.tux.org/~ricdude/EsounD.html )
gsm : Lossy speech compression library and tool. ( http://packages.qa.debian.org/libg/libgsm.html )
jack-audio-connection-kit : A low-latency audio server ( http://www.jackaudio.org )
lame : LAME Ain't an MP3 Encoder ( http://lame.sourceforge.net )
mpg123 : a realtime MPEG 1.0/2.0/2.5 audio player for layers 1, 2 and 3 ( http://www.mpg123.org/ )
musepack-tools : Musepack SV8 libraries and utilities ( http://www.musepack.net )
phonon : KDE multimedia API ( https://projects.kde.org/projects/kdesupport/phonon )
pulseaudio : A networked sound server with an advanced plugin system ( http://www.pulseaudio.org/ )
wavpack : WavPack audio compression tools ( http://www.wavpack.com )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a multilib
For Paludis use this rsync : rsync://gentoo.zugaina.org/multilib-portage
If you have a problem : ycarus(-at-)zugaina.org