I'm trying to minimize the cables to a tv above a fireplace that we are installing. Will it work to run an HDMI cable from the cable box to the tv and a separate audio cable to a home theater system or does the HDMI cable eliminate the option to run the audio to another unit. I'd like to run an HDMI cable from the cable box and the DVD player to a 2-1 HDMI switch and then just have one cable going to the tv, but I'm having trouble getting audio from the cable box to the home theatre system. Any help would be greatly appreciated since once the fireplace walls go up, I can't change the cable setup. Thanks.