Looks really good (bookmarked to read later). Although maybe some more motivation as to why you start music theory with circle of fifths -- as someone who knows nothing about music, I had never heard of it before.
That's a really good question. The reason why I started at the Circle of Fifths is because it's the foundation and it is highly mathematical. It's a tad bit painful to start with, but I wanted to start from the ground up. This will make the other stuff far more understandable. I can go on all day saying "this is how to make a chord" but starting here will let you understand the later ideas better.
I also started here to demonstrate how logical it all is.
You don't seem to provide any context about what the circle of fifths is, or even what a fifth is for, thus I have no idea why I should care, and in general it makes it very hard to assimilate the article in a useful way.
Yeah I agree. I think there should be some mention of why a "fifth" is important (3:2 ratio of frequencies, which is recognizable, and when this is continued, it eventually "loops back" to the original note (at a 2^n:1 ratio, where n is the number of fifths up until it repeats)
