I has set my W7 pro audio to route thru the preamp of a small radio stereo system. However it jumps out of that config to the tiny speakers in my monitor which is connected to the PC with an HDMI cord. Seems to be a conflict; however it worked fine about a yr ago with no problems. HDMI cord fed monitor,
speakers fed by cable plugged into green jack back of PC.
Below are images of the config.