Summary: *Nothing too major, for me at least, because I found the crystallizer enhancement to be a bit of a nuisance more than anything. It oversaturated the highs making me want to over compensate by oversaturating with low end. If you have a lot of... what we say -obtained- music with mismatched playback bitrates, it would probably do you more good than me. All my music is a minimum of 360 kpbs. Anything below that bothers me to some degree as it worsens.
Pros: -Bass no longer drops out like it did with on-board audio on my laptop (Asus G73JW).
Cons: -Not sure if its because this doesn't have as much memory like the desktop audio cards or what, but if you have more than say three or four of the enhancements enabled, the bass starts to dive and take over all the other channels hooked up a little bit, with all those on at least.
Summary: By M. Dowdie I got this to use in place of my ThinkPad's built-in sound. I'd assumed for years that sound cards these days were not noticeably different at performing basic tasks like listening to iTunes, but this one is definitely better than the ThinkPad's. Perhaps it takes a better than average pair of speakers to tell a difference. It is working great and the M-Audio Studiophile AV30 Professional Reference Speakers sound much, much better.
Summary: X-Fi surround 5.1 USB Sound Card is low price. And, It has minimum ports for listening. I have got a environment Clearly Sound for playing DVD and Music CD. When I bought this. Most sound card on PCI bus system have noise, Which is influenced system noise from System BUS. But USB is not in that category. I can say, "There are no noises". I think that If you want pro style recording, X-Fi Surround 5.1 is not fit your request.