Skytopia: World's most unanswered music questions

Skytopia: World's most unanswered music questions: "Over time, I have gathered together many questions about the fundamental nature of music, and decided to create and maintain this page to bring light to them. Answers to some of them may already exist in books and papers, although I suspect that most of them have yet to be answered properly. In fact some of the questions may not have been asked at all!"