Posted 30 January 2012 - 11:28 PM
I occasionally use a USB sound card (in my case, to get an optical output) on my computer, running XP. Whenever I connect the USB sound card the onboard audio is cut off. I can toggle back and forth between the two outputs using the Control Panel, but it doesn't give me the option to use both outputs simultaneously. I think this is normal operation.
It sounds like you want to run one audio stream to the USB card and a second audio stream to the onboard audio. I don't know if there is any way to force the computer to use two different active audio outputs.
If anyone knows of a way to do this I'd like to know, too.