ProElite 6 Channel External Sound Card 5.1 Surround Sound USB 2.0 External Optical S/PDIF Audio Sound Card Adapter for PC Laptop Colour:Black   his external sound card offers a quality solution for upgrading your PC or laptop audio. This device supports 32 KHz, 44.1 KHz and 48 KHz sampling rate in digital and analog recording, and in digital/analog audio playback. In digital playback mode, it receives an audio stream from the PC via a USB interface and transmits audio data according to 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.Three sampling rates;includes 32KHZ,44.1KHZ are automatically locked internally,in analog recording mode,fixed 48khz sampling rate is supported by analog audio recording.