Back before the dawn of time (or at least, before wireless tech was as prevalent as it is now), the optical port served an ...

These cables utilize fiber optic technology to transmit digital audio signals ... ensure your device has an optical audio port and decide whether you prefer to use HDMI for connections instead.

In the home theater space most people would tell you the age of optical audio, known officially as ... to connect a Raspberry Pi to the optical port of your AV system, [Nick Sayer] has you covered.