Thats what I was planning to do, but the Audigy 4 has no coaxial or optical out ports on it.can't you just connect the spdif out on the sound card to the spdif in on the decoder?
That looks to be exactly what I need, although almost £20 is a bit of a **** take tbh. Thanks anywayscreative sell a digital 1/0 module http://uk.europe.creative.com/products/product.asp?category=1&subcategory=16&product=1780 not sure if that is what you are after