C sharp ninth guitar chord (C#9)
Also written Db9 (D flat ninth)
A ninth chord adds a ninth to the seventh chord. A rich, groovy sound, typical of funk, soul and blues.
Positions and fingerings
Position 1 fret 3
Position 2 fret 9
× muted string · o open string · numbers: fingers (1 index, 2 middle, 3 ring, 4 pinky)
Chord notes
| Note | Interval |
|---|---|
| C♯ (C sharp) | root |
| E♯ (E sharp) | major third |
| G♯ (G sharp) | perfect fifth |
| B | minor seventh |
| D♯ (D sharp) | major ninth |
Formula: 1 – 3 – 5 – b7 – 9 · C♯ – E♯ – G♯ – B – D♯
A progression with this chord
The basis of blues and funk: the ninth chord on the first degree, then on the fourth.