Reddit mentions of Musimathics: The Mathematical Foundations of Music (Volume 1) (The MIT Press)

You'd think someone in their late 30's would be beyond the point of jerking their ego off, but here we are.

So that something productive might come out of this, here: https://www.amazon.com/Musimathics-Mathematical-Foundations-Music-Press/dp/0262516551

Your local library might have it, your nearest University's library probably does. Some of the math is a little iffy, but he's an intelligent man and it's all really interesting. To answer what is basically your only question, yes, making music is a common hobby among those who are good with math (as well as being a common hobby among those who blink or breathe).

If you're looking for a pretty in depth look at the math and physics of music, Musimathics is a pretty good book.

If you haven't made much music in the past, I would recommend learning how to DJ while also studying the principles of audio synthesis and music theory.

DJing is a really good way of understanding what elements of a tune make it danceable and exciting - particularly as far as rhythm and harmony are concerned. Digital music production requires a pretty solid understanding of not just computer software but also a few fundamentals, including the physics of sound, the science behind audio synthesis, and then technique things such as editing, signal flow, etc.

A few books I would recommend for getting started are The Computer Music Tutorial and Musicmathics. As far as mixing and mastering is concerned, which are other essential aspects of the production process, I would recommend checking out Robert Katz's Mastering Audio.

Psychoacoustical considerations are probably what most blatantly separate the men from the boys. My recommended starter for this is Music, Cognition, and Computerized Sound by Perry Cook, who is a professor of Computer Music at Princeton.

EDIT: Also, if you don't already, start listening to and appreciating classical music - particularly stuff made after the Renaissance - in order to get an understanding of the emotional impact things such as dynamics and voicing have on the listening experience. Electronic music heavily borrows from the classical music tradition in this context. Digital music production essentially makes you a computerized Mozart, in that you can control dozens of musical voices, but with even more micromanagement potential than the typical classical music conductor can offer. You will not have a complete understanding of these musical concepts from pop/rock music alone, or even from more 'sophisticated' musical practices such as jazz.

You have independently arrived at the mathematical foundations of music theory.

You might enjoy Musimathics, an introduction to music theory through math.

http://www.amazon.com/Musimathics-Mathematical-Foundations-Music-Volume/dp/0262516551

I've only skimmed through this book, but it seems to do a pretty nice job explaining the mathematical and physical basis of music/sounds.

https://www.amazon.com/Musimathics-Mathematical-Foundations-Music-Press/dp/0262516551/ref=asc_df_0262516551/?tag=hyprod-20&linkCode=df0&hvadid=312128059570&hvpos=1o1&hvnetw=g&hvrand=5390734458225666237&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9001910&hvtargid=pla-457218252634&psc=1

A former CCRMA professor wrote this book on the mathematics of music, there is also a second volume that goes into more about composition. It has some pretty hardcore math, but you can also read around the math to get an idea of the physics of sound and some of the ways that we perceive sound.

https://www.amazon.com/Musimathics-Mathematical-Foundations-Music-Press/dp/0262516551