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USB sound "cards" are actually external boxes that plug into the computer via USB. They are more accurately called audio interfaces rather than sound cards.The USB specification defines a standard interface, the USB audio device class, allowing a single driver to work with the various USB sound devices on the market. === RatocSystem RAL-2496UT1 ===[[Image:wiki_RAL-2496UT1.jpg]]Features a Digital Sampling rate of 16/24bit and 44.1/48/88.2/96kHz. When this hits the U.S. market is may be one of the top cards available.* http://en.akihabaranews.com/26123/audio-systems/ratocsystem-new-external-usb-sound-card-with-headphone-amp* USB Audio Interface