USB 6 Channel 5.1 / 7.1 Surround External Sound Card PC Laptop Desktop Tablet Audio Optical Adapter Card Recording K song Description:In analog playback mode, supports 6 channels of analog playback software. In the digital recording mode, it receives SPDIF digital audio input and sends it back to the PC via USB. Add full-duplex audio playback/recording on any PC or Mac.In digital play mode, receive audio streaming PC via USB interface and transmit audio data according to AES EBU, IEC60958, S/PDIF interface standards. Supports 32kbz, 44kHz. (Both of which need controller or software application support) and 48 kHz sampling frequency in digital recording, 48 kHz sampling in digital analog audio playback.