These Spirograph-esque blobs depict a visual representation of musical notes. Dreyfuss patented a system for learning to play music, which gets you around that whole reading sheet-music thing.

GrooVR is a music visualizer, pairing songs of your choosing with abstract virtual environments that pulse in time to the beat. Actually, it’s one of several such projects, including the better ...

In the 2000s, one of the coolest things you could do on a computer was turn on some music, enable the visualizer—a kind of psychedelic-inspired animation that would react to the music—and ...

The output of the visualizer is via Bruce Land’s 8-bit color VGA library, which allows the Pi Pico to drive a monitor directly. Whether the visualizer really gets the music is up for debate.