C-13#9 Minor 7th
The C-13#9 chord is built from the notes C – Eb – G – Bb – D# – F – A.
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Also known as
Cm13#9
Chord tones, one by one
CRoot
Root
The fundamental note the chord is built on — C.
EbThird
Minor third
Three semitones — makes the chord minor (darker, sadder).
GFifth
Perfect fifth
Seven semitones — the most stable interval, reinforces the root.
BbSeventh
Minor seventh (♭7)
Ten semitones — the dominant/minor seventh. Adds bluesy tension (7, m7).
D#Extension
Sharp ninth (♯9)
A ♯9 — the gritty 'Hendrix' tension over a dominant chord.
FExtension
Eleventh (11)
An 11th — a suspended, airy color on top of the chord.
AExtension
Thirteenth (13)
A 13th — full, rich top extension.
🎼 Related scales
🎹 Modal analysis
This chord implies the Dorian scale; its characteristic note is the major 6th (13).
🎸 Genres
Modal jazz · Funk · Soul · Rock