Hey guys. My family and I are moving to a two-story house and am planning to set up a multimedia home theater with Dolby Digital. And mount a big screen! It will be awesome!! I want to hook up 4 signal sources to 2 TV panels and control them. The 4 sources will be my old laptop (no hdmi output), Blu-ray player, cable TV, and PC (video card has HDMI). Question is: can I use hdmi matrix switchers and converters for non-hdmi signals? Do matrix switchers support multi-channel Dolby Digital audio? Thanks for the input!