USB 5.1 Channel Audio Converter is an USB audio converter. It supports 32KHz, 44.1KHz (which two needed drivers or application software support) and 48 Khz in digital/analog audio playback. In digital playback mode, it receives audio stream from PC via USB interface and transmit 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, but it can transmit AC-3 data streams to AC-3 decoder to get 5.1 channel audio. In analog playback mode it supports 6 channels Codec. 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 and 48 Khz are automatically locked internally.