Of all the things of the internet of old, Winamp 2.x, its skins, shoutcast and the visualization library are what I miss the most by far
TripX was the jam. https://winampheritage.com/visualization/tripex3/92178
"ProjectM" exists within Linux as well, but I've never gotten it to work properly on my laptop.
You know, it's funny how ahead of its time Winamp was in many ways.
You can play streams directly from there or via WinAmp.