Ok, here's my problem: I have a reicever that has 3 optcial inputs and 1 coax. Well my coax is taken up by my DVD player, yet I have another caox cable to come from my Digital Cable. So I have a few questions: 1. Will a normal red rca cable be able to transmit a digital source? Sucha s one that came form my DVD player? 2. Now that you know my problem (paragraph up above), can I take the red rca cable (If it works right) from teh digital out on my cable box to the Analog input on my reciever? I understand I want have a digital source, but will I still get sound?