Changing Default Audio Device

I installed Dazzle Instant Record. An external capture card (via USB). I get picture fine but no sound.

I am fairly certain that the problem stems from the defaulted audio output. Under start --> control panel --> sounds -->

I cannot change the defaulted output to Dazzle DVC 100 (which I can do with the microphone settings). How can I do this? All the drivers are installed and listed under sounds in the device manager along with my current defaulted driver "Realtek..."

Any help would be great.