interval
C major third
ClowerEupperM34 half steps
Four half steps. The interval that makes a triad major.
On the keyboard
What is true of it
C up a major third is E: 4 half steps, and 3 letters counting both ends.
Turn it upside down — put the C 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 C
C → D♭minor second · dissonanceC → Dmajor second · dissonanceC → E♭minor third · imperfect consonanceC → Fperfect fourth · perfect consonanceC → F♯augmented fourth · dissonanceC → G♭diminished fifth · dissonanceC → Gperfect fifth · perfect consonanceC → A♭minor sixth · imperfect consonanceC → Amajor sixth · imperfect consonanceC → B♭minor seventh · dissonanceC → Bmajor seventh · dissonance