A useful standard that hasn’t really bothered most of us is S/PDIF, standing for Sony/Phillips Digital Interface. It’s a useful way to pump digital audio around over copper cables or optic fiber.

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 ...

In terms of physical inputs, the new music streamer offers single S/PDIF (RCA), optical, AES/EBU (XLR) and USB-B inputs ...