A few years ago, computer scientist Joren Six was tasked with enabling a wearable computing platform — that is, a microcontroller — to recognize a song. His experiments in using an ESP32 led to a fully-fledged, multi-platform, open-source project that he called Olaf, which stands for “Overly Lightweight Acoustic Fingerprinting.” Olaf is a music-recognition library that’s easy to use on embedded platforms with severely limited memory and computing power. Follow him in his journey!