A major ninth chord (A7M(9)) on piano
The A major ninth chord (A7M(9)) on piano has 5 notes: A, C sharp, E, G sharp, and B (A, C♯, E, G♯, B). With the right hand, use fingers 1-2-3-4-5; with the left hand, 5-4-3-2-1 (1 is the thumb). On the keyboard below, the root (A) has the strongest color; each key shows the note name and the degree.
- Notes
- AC♯EG♯B
- Formula
- 13579
How to play A7M(9) on piano
Root position · From low to high: A C♯ E G♯ B
Right hand: 1-2-3-4-5 Left hand: 5-4-3-2-1
Fingers: 1 = thumb, 2 = index, 3 = middle, 4 = ring, 5 = little finger. The small dot marks middle C (C4). Tap a key to hear the note.
A7M(9) chord inversions
Inverting a chord means putting another of its notes in the bass (the lowest key) without changing the notes. Inversions shorten the way your hand travels from one chord to the next and slightly change the color of the sound.
-
1st inversion (A7M(9)/C#)
A7M(9)/C#: C sharp (3) in the bass
From low to high: C♯ E G♯ A B
-
2nd inversion (A7M(9)/E)
A7M(9)/E: E (5) in the bass
From low to high: E G♯ A B C♯
-
3rd inversion (A7M(9)/G#)
A7M(9)/G#: G sharp (7) in the bass
From low to high: G♯ A B C♯ E
Notes and intervals of A7M(9)
A7M(9) (A major ninth) is built from 5 notes. Each one fills a degree of the chord:
- A · 1 · root
- C♯ · 3 · major third
- E · 5 · perfect fifth
- G♯ · 7 · major seventh
- B · 9 · ninth
About the major ninth chord
A major chord with a major seventh and a ninth: maybe the most "bossa nova" sound there is. Bright and sophisticated, used on the I and IV chords in jazz, Brazilian pop and lo-fi.
Other A chords
- A
- Am
- A7
- A7M
- Am7
- Am7(b5)
- A°
- A°7
- A+
- Asus2
- Asus4
- A7sus4
- A5
- Aadd9
- A6
- Am6
- A9
- Am(add9)
- Am9
- A7M(9)
- Am(7M)
- A7M(#5)
- A7(b9)
- A6(9)
- Am6(9)
- A11
- Am11
- A13
- Am13
- A7(#9)
- A7(#11)
- A7(b13)
- A7(#5)
- A7M(#11)
- A9sus4
Major ninth: other roots
Frequently asked questions
What are the notes of the A7M(9) chord on piano?
A7M(9) (A major ninth) has the notes A, C♯, E, G♯, B. The formula is 1 · 3 · 5 · 7 · 9: root, major third, perfect fifth, major seventh, ninth.
How do you play A7M(9) on piano?
Find the A key and add the other notes above it: A, C♯, E, G♯, B. Play them all together. With the right hand, use fingers 1-2-3-4-5; with the left hand, 5-4-3-2-1.
What are the inversions of A7M(9)?
1st inversion (A7M(9)/C#): C♯ E G♯ A B; 2nd inversion (A7M(9)/E): E G♯ A B C♯; 3rd inversion (A7M(9)/G#): G♯ A B C♯ E.
What does A7M(9) mean?
A7M(9) is the chord symbol for A major ninth. A major chord with a major seventh and a ninth: maybe the most "bossa nova" sound there is. Bright and sophisticated, used on the I and IV chords in jazz, Brazilian pop and lo-fi.
Is the A7M(9) chord the same on piano and keyboard?
Yes. The notes and inversions are the same on any keyboard instrument: acoustic piano, digital piano, keyboard, organ or synthesizer.