interval
B major sixth
BlowerG♯upperM69 half steps
Nine half steps. The minor third turned upside down.
On the keyboard
What is true of it
B up a major sixth is G♯: 9 half steps, and 6 letters counting both ends.
Turn it upside down — put the B 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 B
B → Cminor second · dissonanceB → C♯major second · dissonanceB → Dminor third · imperfect consonanceB → D♯major third · imperfect consonanceB → Eperfect fourth · perfect consonanceB → E♯augmented fourth · dissonanceB → Fdiminished fifth · dissonanceB → F♯perfect fifth · perfect consonanceB → Gminor sixth · imperfect consonanceB → Aminor seventh · dissonanceB → A♯major seventh · dissonance