A9 chord on 4-String Bass – Low C
in Low C (C-A-D-G) tuning
A9
Dominant 9
Notes:A · C# · E · G · B
Piano Left hand Right hand
Fingerings (9)
A9 shapes as text
| Shape | Frets | Fingers | Notes | Difficulty |
|---|---|---|---|---|
| 1 0 5 4 | 1 – 3 2 | C# A G B | hard | |
| 7 4 7 4 | 2 1 3 1 | G C# A B | medium · barre on fret 4 | |
| 9 10 9 6 | 2 4 3 1 | A G B C# | hard | |
| 11 0 11 0 | 1 – 2 – | B A C# G | easy | |
| 1 2 5 2 | 1 2 4 3 | C# B G A | hard | |
| 7 0 9 6 | 2 – 3 1 | G A B C# | medium | |
| 11 0 11 12 | 1 – 2 3 | B A C# G | easy | |
| 11 12 11 12 | 1 2 1 3 | B A C# G | easy · barre on fret 11 | |
| 11 12 11 0 | 1 2 1 – | B A C# G | easy · barre on fret 11 |
The A9 chord (Dominant 9) is built from the notes A, C#, E, G, B. Below are playable fingerings for 4-String Bass – Low C generated for your selected tuning, ordered from open-position shapes up the neck. Tap a diagram to hear it, or switch to the piano view to see the same harmony on keys.
How the A9 chord is built
Formula: 1 · 3 · 5 · ♭7 · 9
| Degree | Semitones | Note |
|---|---|---|
| 1 | 0 | A |
| 3 | 4 | C# |
| 5 | 7 | E |
| ♭7 | 10 | G |
| 9 | 14 | B |
More A chords
Other roots
See A9 in another tuning
What notes make up the A9 chord?
A9 is a Dominant 9 chord built from the notes A, C#, E, G, B.
How do I read the diagram?
Strings run left to right from the lowest to the first string; the numbers show which finger presses each fret. An ○ marks an open string, an ✕ marks a muted one.