Click the sound symbol, then click the mixer, then click the drop down bar on whatever is shown and manually changed it to a different output.
Or you can left click the sound symbol and click 'playback devices' and click set default on each thing until the sound comes out like it should.
Took me a day to figure out how to get my soundcard to work because of this. lol.
And if you have a receiver, having the more advanced features on the computer side probably won't help much since the receiver should be handling most of everything. I'm sure if that's the case someone more knowledgeable will chime in.