We are a commune of inquiring, skeptical, politically centrist, capitalist, anglophile, traditionalist New England Yankee humans, humanoids, and animals with many interests beyond and above politics. Each of us has had a high-school education (or GED), but all had ADD so didn't pay attention very well, especially the dogs. Each one of us does "try my best to be just like I am," and none of us enjoys working for others, including for Maggie, from whom we receive neither a nickel nor a dime. Freedom from nags, cranks, government, do-gooders, control-freaks and idiots is all that we ask for.
Well, the math of music is fascinating but I suspect that composers hear the music in their heads before they write it down, just as writers do with words. Being, sad to say, tone-deaf and a musical no-talent, I can not assert that with any confidence.
One of the loveliest pieces I ever wrote, (a classical piece), I wrote when I was seventeen and it was entirely from math. It was for a theory exam, and afterwards a friend played it for me on the piano, as my piano skills are rudimentary. I couldn't believe what I had composed.
Then again I have been driving along and a rhythm enters my head and it is vastly important to get home and get it down or it will be lost forever. One time I stopped at a music store and rushed in and quickly grabbed a guitar. The guy behind the counter was cool with it; he knew.
He could compose even after his deafness, but eventually he could not perform, because he could not hear the piano. He could only guess at how loud he was playing, so either he played so softly that the audience could not hear him, or he broke the piano trying to play loudly.