Db-alt7#11 Half-Diminished
The Db-alt7#11 chord is built from the notes Db – Fb – Abb – Cb – Ebb – E – G.
Piano sound loads on first tap.
Chord tones, one by one
DbRoot
Root
The fundamental note the chord is built on — Db.
FbThird
Minor third
Three semitones — makes the chord minor (darker, sadder).
AbbFifth
Diminished fifth (♭5)
Six semitones — a flat fifth. Creates instability, typical of m7♭5 and diminished chords.
CbSeventh
Minor seventh (♭7)
Ten semitones — the dominant/minor seventh. Adds bluesy tension (7, m7).
EbbExtension
Flat ninth (♭9)
A ♭9 — sharp, dissonant tension typical of altered dominant chords.
EExtension
Sharp ninth (♯9)
A ♯9 — the gritty 'Hendrix' tension over a dominant chord.
GExtension
Sharp eleventh (♯11)
A ♯11 — the bright, floating Lydian color.
🎼 Related scales
🎹 Modal analysis
This chord implies the Locrian scale; its characteristic note is the unstable ♭5.
🎸 Genres
Modern jazz · Post-bop · Fusion