Wow, who would have known that designing your own sound card would have been this cheap and easy? A low amount of parts, easy-to-read schematic and no need for drivers make this USB-based sound card a steal. The card is powered via a 16-bit Stereo Digital-to-Analog Converter. I have a subtle understanding of what that actually does, but if you can solder, who cares.
After a few hours at Radio Shack and a few more spent at the workbench, you’ll emerge a new man with a new sound card. Go ahead and try it out in XP or Vista as it’s driverless just like many M-Audio and Griffin products. It might not hurt to throw your finished product in a case though.