The octave is equally divided into a variable number of parts and an analysis is performed on how well the resulting notes match the first harmonics. Two cases are particularly relevant: the 12-Tone Equal Temperament, for its simplicity, and the 53-Tone Equal Temperament, for its exactness. Nuño Fernández, L. (2019). N-Tone Equal Temperament. http://hdl.handle.net/10251/122751