G minor.
Every major and minor key, arranged so that neighbours share almost all of their notes. Pick one to see its key signature, its seven chords and its closest relatives — then hear them on a real recorded piano, and find the sheet music written in it.
Playing in G minor.
G minor has 2 flats: B♭, E♭. Its scale is G A B♭ C D E♭ F, its relative major is B♭ major, and its seven chords are Gm, A°, B♭, Cm, Dm, E♭, F.
Mozart's Symphony No. 40 is the most famous G minor in music; pianists have Chopin's First Ballade and Rachmaninoff's Prelude Op. 23 No. 5, a march with a lyrical middle. The storm in Vivaldi's 'Summer' is in G minor too. The scale keeps C major's fingering in both hands, and harmonic minor's raised seventh, F♯, puts a sharp into a flat key.
Sheet music in G minor
For John
original composition
Мама
after Volkanov
Idea 25
after Gibran Alcocer & Andrea Vanzo
Hit the Road Jack
after Ray Charles
Hit the Road Jack
after Ray Charles
Скучаю
after EGO
They Were Starting to Like Me
after David Hirschfelder
Quarantine
after Justin Hurwitz
Porch
after Alan Silvestri
Idea 10
after Gibran Alcocer
Dance For Me Wallis
after Abel Korzeniowski
Armstrong Cabin
after Justin Hurwitz
Turn the wheel. Hear the key.
Pick a key
Click any segment of the circle. The outer ring holds the major keys, the inner ring the minor key that shares the same signature. Arrow keys walk around the circle; M switches between the two rings.
Read the signature
The staff in the middle draws the sharps or flats the way a score does — in the order you write them, on the lines and spaces where they belong. At the foot of the circle you get both spellings, because both are used.
Hear it
Tap any of the seven chords, play the scale, or play the whole cadence. The notes light up on the wheel as they sound. It is a recorded grand piano, not a synthesiser, so the chords ring the way they would under your hands.
What the circle of fifths is.
Why fifths
One step clockwise is a perfect fifth up: C to G, G to D, D to A, and round to C again twelve steps later. Every step that way adds a sharp to the key signature; every step anticlockwise adds a flat. The circle is the key signatures put in order.
The inner ring
Every major key shares its signature with one minor key — its relative minor, three semitones below. C major and A minor both carry no sharps and no flats: the same seven notes, started in a different place.
The seven chords
Stack a triad on each note of the scale and you have the chords of the key. Three come out major (I, IV, V), three minor (ii, iii, vi), and one diminished (vii°). Roman numerals name the position rather than the note, which is why a progression like I–V–vi–IV can be played in any key at all.
Where sharps meet flats
Six o'clock is one set of notes written two ways: G♭ major with six flats, or F♯ major with six sharps. Neither is more correct — you pick whichever makes the page easier to read.
Why the circle is worth knowing.
Key signatures, without the memorising
Count the steps from C and you have the number of sharps or flats. The staff shows you which ones.
Chords that belong together
Any three neighbouring keys are the I, IV and V of the middle one — the chords under a great deal of music.
Transposing
Move a piece one step around the circle and every note shifts by a fifth, key signature included.
Changing key mid-piece
Neighbours differ by a single note, so a step either way is the smoothest modulation there is.
The Evening Piano Mini-Songbook.
Three simple, beautiful arrangements — yours free. Drop your email and I'll send the print-ready PDF straight to your inbox.