If a tuning system different from Just Intonation is used, when playing a combination of 2 or more notes, the ¿Beats¿ arise, which are rhythmical fluctuations of the amplitude as a result of constructive and destructive interferences. A comparison is carried out between Just Intonation and Equal Temperament for major, minor and dominant seventh chords, both with pure and complex tones. Nuño Fernández, L. (2019). Just Intonation: Beats. http://hdl.handle.net/10251/122734