interval
G♭ major third
G♭lowerB♭upperM34 half steps
Four half steps. The interval that makes a triad major.
On the keyboard
What is true of it
G♭ up a major third is B♭: 4 half steps, and 3 letters counting both ends.
Turn it upside down — put the G♭ 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 G♭
G♭ → A♭♭minor second · dissonanceG♭ → A♭major second · dissonanceG♭ → B♭♭minor third · imperfect consonanceG♭ → C♭perfect fourth · perfect consonanceG♭ → Caugmented fourth · dissonanceG♭ → D♭♭diminished fifth · dissonanceG♭ → D♭perfect fifth · perfect consonanceG♭ → E♭♭minor sixth · imperfect consonanceG♭ → E♭major sixth · imperfect consonanceG♭ → F♭minor seventh · dissonanceG♭ → Fmajor seventh · dissonance