How nice to see Stockhausen on the front page. It’s definitely an acquired taste, but if you take the time to dive in, you will appreciate it
https://youtu.be/3hPkJW95jsw?si=73A8IKwO9cvWUGTY
Give yourself some time to listen to it without interruption though.
It was certainly the thing which made it click for me. The other way in that some friends had was the string quartet in helicopters from “licht” that the Kronos quartet recoded.
A teacher of mine used to be in Stockhausen’s band in the 70s so is on some of those classic recordings such as “sternklang” etc. He’s one of the people in this photo although I can’t remember exactly which one. I think he might be the tall dude at the back on the right. I studied 20th century music with him about 40 years after this photo so he looked quite different when I knew him. https://www.karlheinzstockhausen.org/img/Stockhausen_Errata_...
Stockhausen's Oktophonie did the trick for me.