You might want to watch it a little closer. I realized only now that this is a simple animated display which bears no correlation to the audio stream, let alone a result of real time spectrum analysis.
Well, maybe it’s better that way. I need my CPU for things that matter to me. But I am fascinated to notice how easily fooled I was, and how this dumb animated picture gives the illusion of science, high-tech, something sophisticated.
So, I reckon it’s a pretty clever piece of engineering given how dumb it is.