I am using a PC with windows 10 to output via HDMI to an STR-DH750 and I am getting a totally different sound field when I go into the reciever's menu (by pressing the 'HOME' key on the remote). This different sound field is actually how I want to hear the audio, as multi-stereo, and with full response from my subwoofer. When I exit the reciever menu it goes back to forced stereo and I have no subwoofer response. This is when I am playing a stereo source on my PC. I'm looking for some insight as to why this is happening and possibly a solution.