I just swapped my old cable box for the new dolby digital 5.1 surround box. I do not have Hi def but I do have a Denon digital surround system. I am not sure how to get the digital sound from the new box. There is an output for the digital coaxial audio cable(orange). I already use the one coax on my reciever for my dvd player. Is my only option plugging and unplugging the coaxial for the either the dvd player or the Digital cable? thanks