Fig. 1 · Eb to Gb

interval

E♭ minor third

E♭lowerG♭upperm33 half steps

Three half steps. The interval that makes a triad minor.

On the keyboard

EbGb
Fig. 2

What is true of it

E♭ up a minor third is G♭: 3 half steps, and 3 letters counting both ends.

Turn it upside down — put the E♭ on top — and it becomes a major sixth. The two numbers always add to nine, and the two sizes to twelve.

It is a imperfect consonance.

Every interval on E♭

E♭ → F♭minor second · dissonanceE♭ → Fmajor second · dissonanceE♭ → Gmajor third · imperfect consonanceE♭ → A♭perfect fourth · perfect consonanceE♭ → Aaugmented fourth · dissonanceE♭ → B♭♭diminished fifth · dissonanceE♭ → B♭perfect fifth · perfect consonanceE♭ → C♭minor sixth · imperfect consonanceE♭ → Cmajor sixth · imperfect consonanceE♭ → D♭minor seventh · dissonanceE♭ → Dmajor seventh · dissonance

C m3C♯ m3D♭ m3D m3E m3F m3F♯ m3G♭ m3all 204