Circle of fifths
Circle of fifths showing major and minor keys Nikolay Diletsky's circle of fifths in Idea grammatiki musikiyskoy (Moscow, 1679) In music theory, the circle of fifths (or circle of fourths) is a visual representation of the relationships among the 12 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. Definition Structure and use Pitches within the chromatic scale are related not only by the number of semitones between them within the chromatic scale, but also related harmonically within the circle of fifths. Octaves (7 × 1200 = 8400) versus fifths (12 × 700 = 8400), depicted as with Cuisenaire rods (red (2) is used for 1200, black (7) is used for 700). Diatonic key signatures The circle is commonly used to represent the relationship between diatonic scales. Play . History .
Related: figurative art