Five String Banjo · Open D (f♯DF♯AD)

Cø9C Half-Diminished 9th

CRoot
D♯tone
F♯tone
A♯tone
Dtone

Formula 1 · ♭3 · ♭5 · ♭7 · 2  ·  Notes C · D♯ · F♯ · A♯ · D

How to play it

Cø9 fingering positions

Open D (f♯DF♯AD), low E on the left. Each dot is colour-coded by note — the ringed dot is the root. Numbers below show the fret per string (x = muted).

C Half-Diminished 9th guitar chord — 9th position (10 9 9 12 9) fretboard diagram in Open D (f♯DF♯AD)
C Half-Diminished 9th guitar chord — 10th position (10 12 13 13 13) fretboard diagram in Open D (f♯DF♯AD)
Read it as tab

Cø9 guitar tab

The same voicings in tablature — high e on top, low E on the bottom. Each fret number is colour-coded by note; the ringed number is the root, × means don’t play that string.

C Half-Diminished 9th guitar tab — 9th position (10 9 9 12 9) in Open D (f♯DF♯AD)
C Half-Diminished 9th guitar tab — 10th position (10 12 13 13 13) in Open D (f♯DF♯AD)
Sound

How Cø9 sounds

Consonance
2/ 5
Brightness
DarkBright
Character

Moods & genres

Moods
fragiletensebittersweet
Genres
jazz
Theory

Notes & relationships

NotesC · D♯ · F♯ · A♯ · D
Formula (scale degrees)1 · ♭3 · ♭5 · ♭7 · 2
Same notes asCm9♭5Cø7(add9)
Explore

More ways to play C Half-Diminished 9th

Browse the rest of the C chords in this tuning, or open Cø9 in the app for every voicing.

Cø9 in other tunings:

Open GC / Drop CDouble CSawmill / Mountain Modal

See & hear Cø9 in Chordology

The app shows every voicing across guitar, piano, bass, banjo and ukulele — in any tuning, with a capo, and you can play every chord back. All offline.

Hear every chordMore voicingsEvery tuning & capoWorks offline
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