I finally found a serial cable and a computer with a serial port and the audio problem is fixed...whew. I am having the video switching problem still, but at least the surround is great. I am going to go ahead and connect my comcast straight to the TV with an HDMI-HDMI cable to get the 1080 lines and just pass audial via optical to the 1070. Not my ideal solution, but I got no satisfaction out of complaining to Comcast to get them to push a firmware fix.

Thanks for ya'lls help. It sounds awesome!