I use Comcast and my cable box is an Xfinity RNG200N. My Tv is an LG 47LV5500 (1080P) and I have an HDMI cable connected from the DVR to the TV.

I'm having some issues regarding audio. Whenever the picture format is set to Auto DVI/HDMI, I loose audio whenever I switch channels, usually when there is a switch from 1080i to 720P. The option for Fixed offers no audio at all. The only option that works is the Upconvert-2 setting. My question is, is it okay to keep it at upconvert-2? I've heard people say that it's best to keep it at Auto DVI/HDMI; only problem with that is the audio loss I get. Does anyone have any suggestions?