D-alt7b13 Half-Diminished
The D-alt7b13 chord is built from the notes D – F – Ab – C – G#.
Piano sound loads on first tap.
Also known as
Dm7(b5)#11Dm7b5(#4)
Chord tones, one by one
DRoot
Root
The fundamental note the chord is built on — D.
FThird
Minor third
Three semitones — makes the chord minor (darker, sadder).
AbFifth
Diminished fifth (♭5)
Six semitones — a flat fifth. Creates instability, typical of m7♭5 and diminished chords.
CSeventh
Minor seventh (♭7)
Ten semitones — the dominant/minor seventh. Adds bluesy tension (7, m7).
G#Extension
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