And now, with just the addition of a highfalutin LED and some software, the Teensy can output digital audio over optical fiber. S/PDIF, and more specifically optical TOSLINK, uses LED light sent ...
His “TOSLINK Transceiver Hat” utilizes a WM8804 chip from Cirrus Logic to go from the Pi’s I 2 S audio output to S/PDIF. From there the signal goes directly into the TOSLINK input and output ...