Regarding why there are 12 notes per octave, I found answers for my own question. https://music.stackexchange.com/questions/24/why-are-there-twelve-notes-in-an

Regarding why there are 12 notes per octave, I found answers for my own question. https://music.stackexchange.com/questions/24/why-are-there-twelve-notes-in-an-octave#40 https://music.stackexchange.com/questions/24/why-are-there-t... https://math.stackexchange.com/questions/11669/mathematical-difference-between-white-and-black-notes-in-a-piano https://math.stackexchange.com/questions/11669/mathematical-...