Hooking up a Pioneer CLD-1090 laserdisc player and my processor has available coaxial digital inputs but does not have an optical input free.... does the AC-3 rf output work as a digital PCM ouput? I realize that this would not be DD output but would at least be a digital connection for CD, Dolby Pro Logic, and maybe DTS. I realize that to have a DD output I need a demodulator. Thanks for your help.