USB Sound Card is an USB audio controller.It supports 32KBz,44.1khz and 48KHZ sampling rate in digital recording. | External sound card USB 6 channel 5.1 audio supports Record & play back digital and analog audio without a built in sound card . | In digital playback mode,it receives audio stream from PC via USB interface and transmits audio data according to the AES/EBU,IEC60958,S/PDIF consumer interface standards.Only R,L channel PCM audio in 5.1 channel can be conveyed in digital playback mode.In analog playback mode,it supports 6 channels codec for analog playback. | In digital recording mode,it receives S/PDIF digital audio input and sends back to PC through USB. | USB 6 Channel 5.1 External Sound Audio Card for PC Laptop OS support Win10/98/8/7/2000/XP/Mac OS 9.1 (Mac version supports twi channel playback only).