Right, am quite new to the whole 5.1 surround sound scene. Have just gotten my self a Sony DAV-SA30 system, to watch DVDs, and play my PC & PS2 through! I Am a bit confused as to what a Digitial input is??? Is digital input the same as optical?, on the back of the sony it has 2 video inputs and 1 output, one set of these video inputs is labeled as 'Optical Digital In'. Now i though Optical was like the single wire cable, pictured here: http://shop.gameplay.co.uk/webstore...de=PT0527&title=joytech_digital_optical_cable But the connections for the 'Optical Digital In' on the back of the Sony are just the standard 3 AV sockets, Right (red), Left (white), and Video (yellow), not like the connect in link above?? So whats the difference between 2?