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Circle of fifths - Wikipedia, the free encyclopedia
In music theory, the circle of fifths (or circle of fourths) shows the relationships among the twelve tones of the chromatic scale, their corresponding key signatures, and the associated major and minor keys. More specifically, it is a geometrical representation of relationships among the 12 pitch classes of the chromatic scale in pitch class space. Musicians and composers use the circle of fifths to understand and describe those relationships
