Musical Abacus - Key signatures

The C Major Scale is first considered and their notes are sorted by perfect fifths. Then, by adding notes above them the scales with sharps are obtained, as well as the order of sharps. Similarly, by adding notes below them the scales with flats are obtained, as well as the order of flats. All the keys are arranged in the Cycle of Fifths. The major scales can also be obtained by connecting tetrachords. Nuño Fernández, L. (2017). Musical Abacus - Key signatures. http://hdl.handle.net/10251/83218