SPDIF for M1S

ODROID-M1S has an S/PDIF out as an alternate pin which is the 12th of 14-pins. And the pin branches off into two streams, Optical and Coaxial by directly connecting this S/PDIF OUT Board.
You don’t have to worry about riding on the noise from the main audio output. This circuit is completely isolated with ODROID-M1S.