Page 1 of Digital optical input

i`ve got technics dvd hi fi system with 5.1 decoder built in not sure of the exact model but its big and silver with 5 changer dvd. my problem is ive got an xbox and want to use it`s dolby digital function. but my system hasn`t got an optical input is it possible to have 1 fitted if so how?

does it have a co-ax digital input?

No it hasn`t m8. It`s only got phono inputs so i`m stuck with Halo on pro logic. It`s a 4 unit system dvd/cd 5 changer, tape deck, tuner/amp and sound processor. All linked together by falt connectors, it`s driving me nuts it`s got a 5.1 decoder and I can`t aceess it. I was wondering wether an optical input could be connected to the dvd unit. In the manual it says the 5.1 decoder becomes active when it receives a dobly digital signal.

I think your stuck with it. Thats why its better to buy seperates rather than all in one hifi.

Oh well, never mind thanks anyways