It sounds like you have not set your sound output up correctly. EDIT: Do you have the resize mod activated if so try turning it off still has a number of compatibility issues with other namely New Threat, also as well if you got Sega Chiefs mouth mod active is another one to try and turn off.
Yes, I had the resize mod. Will deactivate it.
Also, what is that sound output thing you talked about? Where can I setup that?