Recently my sound went out in ET and Firefox as well. I ended up installing chrome to make browser sound work but a re-install didn't work for ET.
I had installed AppLocale to play some Jap games the night before I noticed it stopped working. I've uninstalled AppLocale and all programs/games I had installed with no change.
I'm running w7 x64 and a usb headset. There's a few extra unnamed sliders in my volume mixer as well, shown in SS.
Thanks in advance for any help you can provide!