Fascinating read, but definitely not for beginners, at least for people like me, who have difficulty naming the notes (I have to go through "doe a deer..." each time, there are seven of them, right?) My total music illiteracy really annoys me. However, whenever I try to pick up some knowledge I got held back by lots of questions that the usual music student (or teacher for that matter) has never thought about and no…
Why are there seven notes? Is this due to an property of the ear? The 7 tones that make up a major scale are basically a cultural artifact of western music (which goes back to gregorian chant). Other cultures have more/fewer tones. Ditto, for the octave concept, why should it be multiples of two? Can you clarify this question? Octaves result from the natural harmonic series: http://en.wikipedia.org/wiki/Harmonic_seri…
It's difficult to draw the line between culture and biology, but that's probably too far to the "cultural" side. There is a basis for those, which is that if you start on the base tone of C and run around the circle of fifths you'll get the white keys first: C -> G -> D -> A -> E -> B -> F#, and you get F by going down from the base tone. The importance of the fifth itself comes from the fact that the first harmonic of the base tone is one octave up, and the next harmonic is very close to an octave and a fifth with equal temprement. This seems more than coincidence.
I also find this a better explanation for why so many cultures pick this up once they are exposed to it. (Which is not to say they give up all their old harmonies but this tuning+scale has certainly gone global.) I really have a hard time imagining the mechanics of the Western Global Harmonic Imperialist Conspiracy; it seems much more likely that it so happens that people we call Westerners found this local optima first and it spread because humans in general like it, and it belongs to all humanity, not "the West", just like "perspective" and mathematics.