Google brought me here: https://www.renderforest.com/music-visualisations. Seems like a very easy option. Milkdrop has been open source for a while now. It might be as easy as just dropping your wav into winamp, turning on milkdrop, and recording your screen.
Here’s an extensive max tutorial on replicating some visuals by audioreactlab (who you should definitely look up): https://www.youtube.com/watch?v=PXh8Z1kiJnw. You might need some other training to get into this but you can always just follow the steps to a T and get something out of it.
I do music videos and animation semi-professionally and I sometimes use VDMX to VJ. The free demo is really capable and it’s not hard to use with just a bit of learning. It can do audio reactive to an extent. Red Giant Trapcode can do some very pretty stuff too if you’re willing to get your hands dirty in after effects but it will take some basic tutorials to get started and some considerable computing power, plus cash. If you want to get started really learning something then Blender is free and can do it all. Look up tutorials on Animation Nodes (in blender) by Jimmy Gunawan and Jacques Lucke. That’s a long, long road though.
I think every PC and Mac computer by now has access to a basic video editor for free. The internet archive has endless public domain video you could put on top of your stuff and I find that editing, as opposed to scripting audio reactive stuff from the ground up, is quite intuitive. Chopping video to the beat is a tried and true technique and with a few keyframed effects you could even make something that seems downright intentional.
P.s. hi all, long time lurker, first time poster, you know the drill.