Sound in Gentoo, ALSA + nVidia HDA

> lspci
00:05.0 Audio device: nVidia Corporation MCP61 High Definition Audio (rev a2)

Codec: Realtek ALC861-VD

URL: http://www.gentoo.org/doc/en/alsa-guide.xml

backend Gstreamer or Xine

URL: http://www.alsa-project.org/main/index.php/Matrix:Module-hda-intel

In home directory create file ".asoundrc"

After that in some applications may be very quiet sound.
Check PCM channel in mixer (alsamixer).

Usefull links:
http://ru.gentoo-wiki.com/wiki/HOWTO_Alsa_И_Многопоточный_Звук
http://alsa.opensrc.org/FAQ026