Creative labs X-FI series does NOT support dolby 5.1 on the digital out and their cards will NOT decode 5.1 on the digital IN.Why did I get this again?If all you need is a stereo in/out then this works fine.Who would buy a X-FI to do stereo.See my review of the Fatal1ty sound card for more detail.Documentation? We don't need none of *that* apparently!I am quickly losing faith in Creative Labs....This product is going back