Support AES/EBU, IEC60958, S/PDIF$Really support hardware 5.1 channels, virtual 7.1 channels, optical fiber output 2.1 stereo can be connected to hard (true) 5.1 speakers$Independent sound card full-duplex audio stream playback and recording, without PC built-in sound card$USB2.0 is backward compatible with USB 1.1; compatible with audio equipment specification V1.0;$Support USB full-speed transmission specification up to 12Mbps;