Tube USB to S/PDIF audio interface, up to 24bit/192kHz, based on CMedia 6631 chip, an externally power, S/PDIF buffered with a lamp in the output, flyback regulator for high voltage VHF lamp ECC85 (S/PDIF signal bit rate, 2.8 -6,146MHz). . . Fantastic nonsense, that sounds great, digital in electrons of parallel cathode follower! The device is flashed on the Asus Xonar Essence One, and used his original driver (supports 32bit).