Comment 302 for bug 1166529

You can fix the pulseaudio mapping issue by editing the file /usr/share/pulseaudio/alsa-mixer/profile-sets/default.conf, and setting the option:

[Mapping analog-surround-51]
device-strings = surround51:%f
channel-map = front-left,front-right,front-center,lfe,rear-left,rear-right
paths-output = analog-output analog-output-lineout analog-output-speaker
priority = 8
direction = output

Changing the channel-map to what I have above. By default, it's front-left,front-right,rear-left,rear-right,front-center,lfe. The order of pins on the SBZ is funky, 0x10 is center/lfe and 0x11 is rear surround. Most of the time, it's rear surround then center/lfe.