Hi Poppachubby

The difference is that usb connections will only sustain 16 bit files, which is why I want to know how can I tell if my card has optical or co-ax output. If you download 24 bit files from specialist sites such as Linn audio there would not be any point with usb. Can you help? What kind of card do I need and which output would I then use, headpone? The answer is don't bother with usb. By the way, all apple downloads via i tunes are 16 bit, but what about when they upgrade to 24 bit or more? usb connections will soon be redundant!