A9 chord on Octave Mandolin
in Standard (GDAE) (G-G-D-D-A-A-E-E) tuning
A9
Dominant 9
Notes:A · C# · E · G · B
Piano Left hand Right hand
Fingerings (11)
A9 shapes as text
| Shape | Frets | Fingers | Notes | Difficulty |
|---|---|---|---|---|
| 6 6 5 5 2 2 5 5 | 4 4 2 2 1 1 3 3 | C# C# G G B B A A | hard | |
| 4 4 7 7 4 4 3 3 | 2 2 4 4 3 3 1 1 | B B A A C# C# G G | hard | |
| 4 4 5 5 4 4 5 5 | 1 1 2 2 1 1 3 3 | B B G G C# C# A A | easy · barre on fret 4 | |
| 6 6 5 5 0 0 7 7 | 2 2 1 1 – – 3 3 | C# C# G G A A B B | medium | |
| 6 6 7 7 10 10 7 7 | 1 1 2 2 4 4 3 3 | C# C# A A G G B B | hard | |
| 0 0 11 11 0 0 7 7 | – – 2 2 – – 1 1 | G G C# C# A A B B | hard | |
| 0 0 9 9 0 0 9 9 | – – 1 1 – – 2 2 | G G B B A A C# C# | easy | |
| 0 0 7 7 4 4 7 7 | – – 2 2 1 1 3 3 | G G A A C# C# B B | medium | |
| 12 12 9 9 12 12 9 9 | 2 2 1 1 3 3 1 1 | G G B B A A C# C# | medium · barre on fret 9 | |
| 0 0 9 9 12 12 9 9 | – – 1 1 2 2 1 1 | G G B B A A C# C# | medium · barre on fret 9 | |
| 12 12 9 9 0 0 9 9 | 3 3 1 1 – – 2 2 | G G B B A A C# C# | medium |
The A9 chord (Dominant 9) is built from the notes A, C#, E, G, B. Below are playable fingerings for Octave Mandolin 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
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.