• C
• G
• D
• A
• E
• B
• F#
• Db
• Ab
• Eb
• Bb
• F
The circle of fifths has a number of purposes in music:
• It can be used to find the key signature for a given major or minor scale. The key signature is a group of sharps or flats that are added to the staff to indicate the tonic (or "home") note of the scale. The key signature for a major scale is the note that is five steps (seven half-steps) above the tonic note. For example, the key signature for the scale of C major is G major, which has one sharp (#) on the note F#.
• It can be used to find the chords that are built on a given note. The circle of fifths can be used to find the chords that are built on a given note, such as the major chord, minor chord, dominant seventh chord, and so on. For example, the chords that are built on the note C are C major, C minor, C dominant seventh, and so on.
• It can be used to modulate between keys. Modulation is the process of changing from one key to another. The circle of fifths can be used to find the keys that are closely related to a given key, and therefore make it easier to modulate between keys. For example, the keys that are closely related to the key of C major are G major, D major, and F major.
The circle of fifths is a valuable tool for musicians of all levels. It can be used to understand the relationships between notes, chords, and keys, and to make it easier to write and play music.