Dominant 7th ♭13 Chords on Piano

The dominant 7th ♭13 chord adds a minor 13th (enharmonically an augmented 5th in the upper register) to a dominant 7th, creating a dark, chromatic alteration that works beautifully in jazz ballads and minor-key resolutions. It suggests the altered or harmonic minor sound without fully committing to either.

Formula: Root – Major 3rd – Perfect 5th – Minor 7th – Minor 13th

Scale degrees: 1–3–5–♭7–♭13

Sound: Dark, lush, ballad-like, chromatic

Symbol: 7♭13 (C7♭13)