“John Coltrane had drawn this diagram, illustrating the mathematics of music… And it’s not surprising that Coltrane was the one who created and integrated the concept considering that he was a genius, and the fact that he had a much deeper knowledge of music and of spiritual life than most of his contemporary musicians of that time.”

mysteriousfactsweird.quora.com

This is an amazing diagram. Perhaps some of you professional or serious jazz musicians knew about it, but I was sure ignorant. And I am still so ignorant that I don’t understand how he used it. But that was some mind.