Sound is some how disabled for some programs

i've had problems with chrome based browsers when the audio card was set to something more than stereo.
otherwise it is a problem with the soundcard being setup to only allow one thing connected at a time.
and if it isn't that, then the codec for the audio and|or video is either missing or broken.

I have the same problem except the thread above whith the 2 boxes are checked but im still having this problem. Any ideas?