Half-diminished chord (m7♭5): formula 1 ♭3 ♭5 ♭7. A diminished triad with a minor 7th: the ii chord of minor keys (iiø7–V7–i) and the vii chord of major ones.
Half-diminished chord (m7♭5): formula 1 ♭3 ♭5 ♭7. A diminished triad with a minor 7th: the ii chord of minor keys (iiø7–V7–i) and the vii chord of major ones.