SMAKN&reg; Hi-Fi CM6631 USB to Coaxial / Optical SPDIF Convertor For DAC 192KHZ/24bit ASIO Coaxial, optical fiber output, support 24bit/192KHZ and ASIO mode. Coaxial and optical output are high-speed buffer output Coaxial isolated output Coaxial output support multichannel DTS signal Support XP, WIN7 (32-bit, 64-bit), Vista, Mac os