Here's a headscratcher,

Today I got a USB 'sound card' so that I could split my audio outputs because my PC doesn't distinguish the front and back jack inputs as separate. My headset now goes into the USB but isn't recognised as the default sound device, so only designated programs like mumble and teamspeak play through the headset, kind of like an xbox live headset I guess. What I'd like to do is set up ARMA so all of the in-game SFX and music come through my speakers and the VON comes through the headset - is there a way to do this?

Thanks in advance :D