C C♯/D♭ D D♯/E♭ E F F♯/G♭ G G♯/A♭ A A♯/B♭ B
Major (Ionian mode) Dorian mode Phygian mode Lydian mode Mixolydian mode Minor (Aeolian mode) Locrian Harmonic Minor
A diminished major seventh chord (A, C, D♯, G♯)