He already had schematic symbols and programmers for the ... been so much simpler to use addressable LED’s, such as the WS2812B or the APA102C. You can drive them using a more basic micro ...

The build is open-source, and designed to work with strings of 60, 120, or 180 WS2812B LEDs. An Arduino Nano is charged with running the show, capturing audio via its analog-to-digital converter.