interval
B major third
BlowerD♯upperM34 half steps
Four half steps. The interval that makes a triad major.
On the keyboard
What is true of it
B up a major third is D♯: 4 half steps, and 3 letters counting both ends.
Turn it upside down — put the B 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 B
B → Cminor second · dissonanceB → C♯major second · dissonanceB → Dminor third · imperfect consonanceB → Eperfect fourth · perfect consonanceB → E♯augmented fourth · dissonanceB → Fdiminished fifth · dissonanceB → F♯perfect fifth · perfect consonanceB → Gminor sixth · imperfect consonanceB → G♯major sixth · imperfect consonanceB → Aminor seventh · dissonanceB → A♯major seventh · dissonance