interval
C major sixth
ClowerAupperM69 half steps
Nine half steps. The minor third turned upside down.
On the keyboard
What is true of it
C up a major sixth is A: 9 half steps, and 6 letters counting both ends.
Turn it upside down — put the C 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 C
C → D♭minor second · dissonanceC → Dmajor second · dissonanceC → E♭minor third · imperfect consonanceC → Emajor third · imperfect consonanceC → Fperfect fourth · perfect consonanceC → F♯augmented fourth · dissonanceC → G♭diminished fifth · dissonanceC → Gperfect fifth · perfect consonanceC → A♭minor sixth · imperfect consonanceC → B♭minor seventh · dissonanceC → Bmajor seventh · dissonance