Fig. 1 · G# to B#

interval

G♯ major third

G♯lowerB♯upperM34 half steps

Four half steps. The interval that makes a triad major.

On the keyboard

B♯G#
Fig. 2

What is true of it

G♯ up a major third is B♯: 4 half steps, and 3 letters counting both ends.

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

It is a imperfect consonance.

Every interval on G♯

G♯ → Aminor second · dissonanceG♯ → A♯major second · dissonanceG♯ → Bminor 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 M3C♯ M3D♭ M3D M3D♯ M3E♭ M3E M3F M3all 204