What does HackerNews think of projectm?
projectM - cross-platform music visualization. Open-source and Milkdrop-compatible
Which has a ridiculous level of cross-platform compatibility. I can throw up 3 copies of projectM-pulseaudio on my big 3-monitor work machine and have it listen to any audio sink, I've got it installed on my Android TV and it happily responds to whatever audio's being played, so works with streaming apps and whatnot.
There's also thousands and thousands of presets you can add which the community has been adding to since way back when it was still milkdrop, and people have made curated lists like this person's NestDrop: https://thefulldomeblog.com/2020/02/21/nestdrop-presets-coll...
I haven't been able to find a proper way to set up mesh size on windows but if you're running it on linux or android, those options are available too.
But Milkdrop is alive in open source cross-platform too. https://github.com/projectM-visualizer/projectm
[1] https://github.com/projectM-visualizer/projectm [2] https://www.clementine-player.org/