1MAIN FUNCTION: 1 sound decoder decodes sound from HD multimedia interface, optical, coaxial, PC USB, Bluetooth, and USB flash drive playback into 1 independent channels of output (6 channels), which is then amplified by amplifier or active speakers for volume output. 2MULTI INTPUT: Sound decoder supports 1 channel HD multimedia interface input, 1 channel ARC input, 1 channel digital coaxial input, 1 channel digital optical input, 1 channel digital EPC USB input, 1 channel Bluetooth 0 input, 1 channel USB0 interface input, which can be freely switched between different signal sources by button or remote control. 3SAMPLING FREQUENCY: DSP sampling frequency is 24bit 192KHz, which can achieve accurate bit by bit sound reproduction. Enjoy decoded sound output with directional sound. After decoding, all sound details are retained in the original HD feed. 4MULTI FORMAT SUPPORT: Decoder supports HD multimedia interface version 0b (resolution support up to 4K and 60hz) compatible with HD multimedia interface version Support HDCP version 3, compatible with HDCP version 2, HDCP version 4, support 3D and HDR, support DTS, DTS ES, DTS WAV, AC3, FLAC, APE, HDCD, AAC, WMV, MP3, M4A and other digital sound formats and decoding. 5SOUND OUTPUT MODE: Digital sound decoder automatically detects and identifies the input digital sound signal format, if the source is 1CH, then hard decode (real 1), if the source is 0 or 1CH, then soft decode (virtual 1). Support 0CH and 1CH two channel output mode, 0CH mode that is FL FR output.