I read that it could be up to 640 kps. Is that's what I'm getting out the Toshiba's 6-channel out? If so, why can't it go out the old-fashioned digital cable. Dolby 640 goes out The JVC D-VHS'es optical out. What gives with that? Unless, Dolby + is beyond the 640 kps version. Is it? What the hell is Dolby +??? It sound really good, what is it?