A Dominant seventh flat ninth flat thirteenth sharp eleventh

The dominant 7♭9♭13♯11 is a high-contrast altered dominant: the lowered ninth and lowered thirteenth create a shadowed, chromatic foundation, while the raised eleventh adds a sharp, luminous upper color against the major third. It is the kind of chord you reach for when harmony should feel both heavy and brilliantly edged—common in modern jazz, fusion, and dramatic scoring.

How it’s built

Conceptual stack: 1-3-5-♭7-♭9-♯11-♭13 (the fifth is often omitted first). In C7♭9♭13(♯11), a workable spelling includes C-E-B♭-D♭-F♯-A♭ while distributing the root across the ensemble. 3 and ♭7 keep dominant function; the three altered extensions define the chord’s cinematic personality.

Usage

Use it at climax dominant moments before strong resolutions, especially when you want altered darkness without losing an upper line that can soar on ♯11. It pairs well with improvisational approaches that treat the dominant as a temporary “altered island” rather than a stable color.

Examples

• Modern jazz altered dominants approaching minor or major targets
• Fusion solos where the upper structure supports Lydian-dominant lines