Circle of fifths +

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The circle of fifths is a diagram that shows the relationships between the keys in music. It can help you to determine the accidentals, the scales and the chords of a key. Here are points that every musician needs to know about the circle of fifths:

The circle of fifths consists of an outer circle for the major keys and an inner circle for the minor keys.
The parallel major and minor keys have the same accidentals and are aligned in the circle of fifths.