D7#9 Dominant 7th
The D7#9 chord is built from the notes D – F# – A – C – E#.
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Also known as
D#9D7(#9)D7(add#9)D7add#9
Chord tones, one by one
DRoot
Root
The fundamental note the chord is built on — D.
F#Third
Major third
Four semitones — makes the chord major (brighter, happier).
AFifth
Perfect fifth
Seven semitones — the most stable interval, reinforces the root.
CSeventh
Minor seventh (♭7)
Ten semitones — the dominant/minor seventh. Adds bluesy tension (7, m7).
E#Extension
Sharp ninth (♯9)
A ♯9 — the gritty 'Hendrix' tension over a dominant chord.
🎼 Related scales
🎹 Modal analysis
This chord implies the Half-whole diminished scale; its characteristic note is the ♭9 / ♭2.
🎸 Genres
Bebop jazz · Hard bop · Gypsy jazz
🎤 Artists who made it famous
Jimi Hendrix · The Beatles