Recently discovered this absolute genius:https://www.youtube.com/watch?v=JPbgHcZ5RiI
He made the soundtrack to Hereditary and the Uzumaki-Trailer so I've known his tunes since at least 2018 but I never really bothered to look into it. Just thought he was just a composer and the music was done with several intstruments and electronic help. Then I stumbled over the Uzumaki-Trailer again and saw someone in the comments mentioning how impressive it was, that he played ALL of which you hear only on the saxophone.
Then I dug a little deeper and was utterly impressed.
With circular breathing, he never stops playing once he starts. With up to 40 microphones when recording, you can hear the valves opening and closing, making percussion sounds, one mic on his throat picks up his wierd "singing" he does WHILE playing the sax nonstop. It's a musical masterpiece while also being a physical strain none of us could endure without years of training (he used to be an athlete he said in a interview btw).
Really glad I stumbled into this rabbithole.