Coincidentally, one of the first things I tried to build while learning to code was a C compiler ^_^ It took a long time, but I learned many valuable lessons about how Windows and CPUs work.

But I brought up Just Intonation here because people tend to use that when they sing freely. So I would see this as a way to first understand why people (and famous composers) act the way they do before one tries to categorize things scientifically.