Since I have also Gentoo Linux on my computer, I tried to install TeamSpeak (of course). At the installation, there's no problem... but then no sound is detected. I tried to modify all of the options, nothing happens, I get "Error, could not open the selected Capture Device.".

Configuration :
Gentoo Linux x86-64 (with KDE)
Realtek sound card (Intel HD Audio compatible)
ALSA