Magic Music Visuals

53 secs into the video: https://youtu.be/SZzehktUeko?t=53 (the black shadows)
244 sec into the video: https://youtu.be/SZzehktUeko?t=244 (generally an amazing scene)

I have a basic idea with polygons and iterator frequencies in scale and translate modules and whatnot, but especially with the camera tracking around the second scene I wonder if it wouldn't be easier to just write a shader for this job?
Maybe our local iterator-jedis (hint, hint) can enlighten me?

I know that Chris Jones uses blender and is outstanding in what he does, so I guess whatever you use it will be hard to create something similar.

Ideas/Suggestions?

Just looking at this very quickly, especially for the first example, I think you could experiment with the Waveform module and the Trails module, maybe using more than one of each of them, and coloring them or blending them somehow.