On a different topic here are some alsa settings I found from around the web that work with this board:
To use HDMI audio by default, create ~/.asoundrc and add:
No need to reboot, it should take effect immediately (fyi, I'm using the nvidia graphics drivers..I'm not sure if that is necessary or not)
To use analog 5.1 audio (from the 3 headphone jacks in the rear panel):
then reboot and run alsamixer to enable the proper channels
sudo sh -c 'echo "options snd-hda-intel model=3stack-6ch enable=1 index=0" >> /etc/modprobe.d/alsa-base.conf'