Let me give this a try. I think what he is using is a digital cable box provided by the local cable company. They do output Dolby Digital but only on a few channels. You will have to use the digital out on the back of the unit and run it to a DD or DTS decoder. You will also need the appropriate speakers (fronts, center, rears, sub) I recently set up a similar system for my brother-in-law and was not at all impressed. I think you are much better off buying DSS.
Digital Cable????
I just had D/Cable installed thinking I was getting the most in visual/audio. I am buying and having a home theater installed and figured that the audio from D/C would be utilizing all the modern tech. of the new a/v rec.'s... Is it true, could it be that when I watch a movie, HBO,MAX, ect in digital cable that the audio will be pro logic at best??? Sounds like a serious flaw in technolgy to me..