interval
D major sixth
DlowerBupperM69 half steps
Nine half steps. The minor third turned upside down.
On the keyboard
What is true of it
D up a major sixth is B: 9 half steps, and 6 letters counting both ends.
Turn it upside down — put the D 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 D
D → E♭minor second · dissonanceD → Emajor second · dissonanceD → Fminor third · imperfect consonanceD → F♯major third · imperfect consonanceD → Gperfect fourth · perfect consonanceD → G♯augmented fourth · dissonanceD → A♭diminished fifth · dissonanceD → Aperfect fifth · perfect consonanceD → B♭minor sixth · imperfect consonanceD → Cminor seventh · dissonanceD → C♯major seventh · dissonance