back when I was a kid in primary school, one day there was a well-known children's books author who came by to talk about their books and their writing process, where everyone could ask questions

one of the things that always stuck with me, because I was already getting curious around that time about what brains could do when pushed, was when they explained that they sleep with a little notebook on their nightstand, and when they woke up they'd write down their dreams before they could forget and that's where they got a lot of their story ideas
 
and since then I've been paying a lot more attention to my dreams, and what comes up in them, and how much of it is nonsense vs. actually plausible things - and over the years, my dreams have become more and more like small feature films with mostly coherent plots

so it's really satisfying to be able to tick off another box and know that my dreams do, in fact, produce real music, and don't just simulate a fleeting belief in it existing