interval
G♯ major sixth
G♯lowerE♯upperM69 half steps
Nine half steps. The minor third turned upside down.
On the keyboard
What is true of it
G♯ up a major sixth is E♯: 9 half steps, and 6 letters counting both ends.
Turn it upside down — put the G♯ on top — and it becomes a minor third. 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♯ → 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♯ → F♯minor seventh · dissonanceG♯ → F𝄪major seventh · dissonance