Circle of fifths
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In music theory, the circle of fifths organizes the twelve pitch classes of the chromatic scale in a cycle of ascending perfect fifths. Since the cycle ascends in the opposite direction by perfect fou
Circle of fifths in Idea grammatikii musikiyskoy (Moscow, 1679)
Key signature
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In Western musical notation, a key signature is a set of sharp, flat, or rarely, natural symbols placed on the staff at the beginning of a section of music. The initial key signature in a piece is pla
Circle of fifths
…circle of fourths. Starting on a C, the sequence is: C, G, D, A, E, B/C♭, F♯/G♭, C♯/D♭, A♭, E♭, B♭, F, and C. This order places the most closely related key signatures adjacent to one another. Ascending by twelve justly tuned perfect fifths with a frequency ratio of 3:2 does not return exactly to the starting pitch…
Key Signature C major
Key Signature G major
Key Signature F major
Key Signature D major