Fig. 1 · G# to A

interval

G♯ minor second

G♯lowerAupperm21 half steps

One half step, written as a second: the smallest distance between two notes with different letters.

On the keyboard

AG#
Fig. 2

What is true of it

G♯ up a minor second is A: 1 half step, and 2 letters counting both ends.

Turn it upside down — put the G♯ on top — and it becomes a major seventh. The two numbers always add to nine, and the two sizes to twelve.

It is a dissonance.

Every interval on G♯

G♯ → A♯major second · dissonanceG♯ → Bminor third · imperfect consonanceG♯ → B♯major third · imperfect consonanceG♯ → C♯perfect fourth · perfect consonanceG♯ → C𝄪augmented fourth · dissonanceG♯ → Ddiminished fifth · dissonanceG♯ → D♯perfect fifth · perfect consonanceG♯ → Eminor sixth · imperfect consonanceG♯ → E♯major sixth · imperfect consonanceG♯ → F♯minor seventh · dissonanceG♯ → F𝄪major seventh · dissonance

C m2C♯ m2D♭ m2D m2D♯ m2E♭ m2E m2F m2all 204