5.1 output not appearing in system settings->sound ubuntu 14.04

[Pablo]

Here is my alsa information http://www.alsa-project.org/db/?f=28d4f08505741656bfb1905b7bc21e20365ae5de

I am currently outputting audio through SPDIF to a 5.1 system, but I only get stereo pcm audio option in system settings->sound. I can see no 5.1 ac3 output. I could however see it for a brief time whenever I logged in as guest or created a new account. Now, the 5.1 output appears not even there, it just vanished. I followed these instructions to no avail:

https://help.ubuntu.com/community/DigitalAC-3Pulseaudio

Thanks in advance.