Please help, need some advice, I have a Yammie 3090 and wish to ask about its AC-3 decoding. Does the amp only produces digital surround if a digital signal from a co-axial cable is connected. I have a DVD player which has the digiatl co ax output, but the amp does not regonise it. Using a optical cable the amp indicates a PCM source but it will not go into AC-3 decoding. Is the big yammie a bit outdated now?, as it does not support DTS and Dolby digital from DVDs. I have had the amp from new and I am pleased from its perfomance. Can you suggest some solutions so that I can get digital surround from the amp.