Went on a side quest while working on an unrelated project. Milkdrop is an audio visualizer that was popular among many Winamp users, and I asked Claude to build a WASM+WebGPU port, and /mostly/ walked away with some guidance peppered throughout the multi-day session.

https://milkdrop.mahae.dev/

If you're on a laptop/desktop, it'll ask for mic access and react to whatever you're playing (or surrounding sounds), if you're on mobile you may need to speak into your phone or point it at some music since the mic disables its speaker. Enjoy!