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A piano reference: chords, scales, theory & ear training.

Chord type

Dominant 7th ♭9 ♯11 Chords on Piano

The dominant 7th ♭9 ♯11 chord is a heavily altered dominant voicing that combines the dark tension of the ♭9 with the bright lift of the ♯11. These two alterations pull in opposite directions (the ♭9 darkens, the ♯11 brightens), creating a complex, sophisticated sound heard in modern jazz and film scoring.

Each key below opens the full reference entry — keyboard diagram, audio, inversions, fingerings, and notation.

Formula: Root – Major 3rd – Diminished 5th – Perfect 5th – Minor 7th – Minor 9th
Scale degrees: 1–3–♭5–5–♭7–♭9
Sound: Complex, modern jazz, film score, multi-dimensional
Symbol: 7♭9♯11 (C7♭9♯11)

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All 18 spellings, ♯ and ♭ keys listed separately.

Dominant 7th ♭9 ♯11 Chord in All 18 Keys