I updated to 14.04. My sound immediately transitioned from being normal to sounding extremely quiet, sounding like it was at 5% of max volume, though all my volumes were set properly. I tried lots of things to fix it by adjusting volumes, reloading ALSA, etc.
I then ran 'aplay -l' which output that I had an ALC892 sound card. I google'd issues with 14.04 and ALC892 and found a solution which said to modify
and add to the end of the file:
It worked and fixed it! Now when I run 'aplay -l' it just reports my sound card as HDA Intel PCH.
My question is, why did this fix my sound?