I have a dvd/receiver, hdtv, and a comcast box. I was going to run an optical cable from the box to my tv. Then run interconnect audio cables from my tv to my receiver. Have a dvi to hdmi cable from my box to my tv. So my questions is, if i run an optical cord from my box to my tv for audio, will the audio cables i hook up with my hdmi to my receiver give surround sound or not work at all because the cable box isnt hooked up to the receiver?