With it you can get rid of PC power, turn off slow, power noise and so disturbed. 1 x HIFI Digital Sound Card I2S SPDIF Optical Fiber for Raspberry pi 3 2 model B. PCB board adopt gold plating process, wire arc (high-end HIFI DAC to adopt arc line), ensure better signal Continuity Impedance, reduce reflection and refraction of the signal.
eBay