Interface and function of Draco decoder: Input interface: optical fiber, coaxial, AES balance, I2S , USB Output interface: one set of XLR balance, one set of RCA Standby: standby / start button Input: signal input selection button NOS: oversampling on / off button, the indicator light is off, it means oversampling; The indicator light is on and the original sampling rate is on; Draco decoder Features Description: R2R array DAC, true balance Multiple input interfaces to meet the needs of different groups Using Alter master control, ARM HIgh-Performance chip Packaged linear power supply, o-core transformer.