Surprised it took me this long to get interested in Messiaen work. Really liking his early organ works, even something like "La Fêtes des Belles Eaux" has something unique to it despite the goofy early electronic experiments. Quickly thought about KOMORI from Fujita after hearing some long droning organ sequences
Messiaen - "L'Ascension" (Par Lui-Même) https://www.youtube.com/watch?v=7FHc2ooFT3E