2. The method of claim 1 , wherein the step of notating music notes includes defining a single set that consists of twelve structures, keys or positions corresponding to twelve pitch levels and each structure, keys or positions is numbered from one to twelve.
2. The method of claim 1 , wherein the step of notating music notes includes defining a single set that consists of twelve structures, keys or positions corresponding to twelve pitch levels and each structure, keys or positions is numbered from one to twelve. 4. The method of claim 2 , wherein each of the twelve pitch levels in a single set is named after one of twelve months in a calendar year, wherein each pitch level has the same name in each of the plurality of sets, and wherein each of the plurality of sets is distinguished from the other sets by a letter in the alphabet.