"Music theory" is not a theory per se, it's mostly a fancy way of saying "rules for notating piano".
In the linked textbook the real actual theory only starts in chapter 33, "Set Theory". (The exposition of the actual theory is pretty bad, though - zero explanation of what consonance/dissonance is, where the 12 notes come from and the reason why our particular scales exist.)
Comments
"Music theory" is not a theory per se, it's mostly a fancy way of saying "rules for notating piano".
In the linked textbook the real actual theory only starts in chapter 33, "Set Theory". (The exposition of the actual theory is pretty bad, though - zero explanation of what consonance/dissonance is, where the 12 notes come from and the reason why our particular scales exist.)