A ninth piano chord (A9)
A ninth chord adds a ninth to the seventh chord. A rich, groovy sound, typical of funk, soul and blues.
On the keyboard
Root position
- Notes
- A – C♯ – E – G – B
- Fingering (right hand)
- 1 – 2 – 3 – 4 – 5
Chord notes
| Note | Interval |
|---|---|
| A | root |
| C♯ (C sharp) | major third |
| E | perfect fifth |
| G | minor seventh |
| B | major ninth |
Formula: 1 – 3 – 5 – b7 – 9 · A – C♯ – E – G – B
A progression with this chord
The basis of blues and funk: the ninth chord on the first degree, then on the fourth.