Kind of an odd issue with sound here. It was initially having problems until I used the msi tool mentioned elsewhere.

 

Now it plays crystal clear for a while and then (not sure yet what the trigger might be) goes back to muted and garbled. Seems to be related to youtube, but I could be wrong.

 

I'll post with more info as I gather it.

 

I've attached my hardware profile.

profile.txt

Now this is also odd. After a restart windows said it found new hardware and installed drivers, all of which was hardware that I already had drivers for.

 

I ignored this for the time being and proceeded to browse the web for awhile, decided to test the audio and see if I could nail it down, and sure enough it got distorted after a few minutes, so I fired up the MSI utility to verify the setting was still enabled. It was, but there are now two or three of several hardware items, I set the MSI enabled to the new copy of the sound card and it got worse. So disabled the MSI to both and it works better than it was before, though still not perfect.