I have the HDMI out from my graphics card going to my HDTV. The other output goes to a monitor. The 2 are set up so the desktop spans the monitor and tv. But that shouldn't really be important. For the audio, I have 1/8" extension cord with a 1/8" stereo to 2 RCA jack adapter. That goes to one of the receiver's audio inputs. The PC is on a 3 prong outlet so as far as I can tell, everything should be grounded. The chipset is by realtek (HD). I tried a shorter cable and that seemed to be a little better so I'm thinking the cable might need to be shielded. Any ideas? Thanks.