A7 chord on piano
A7 · Adom7 — the chord on the fifth step of a key: it pulls strongly home, and it is the sound of the blues.
| Notes | A – C♯ – E – G |
|---|---|
| Formula | 1 – 3 – 5 – ♭7 |
| Symbols | A7, Adom7 |
| Fingering (root position) | Right hand 1 2 3 5 · Left hand 5 3 2 1 |
How to play A7 on the piano
Start on A. Add C♯, E, G. With the right hand use fingers 1 2 3 5; with the left hand 5 3 2 1. Press the keys together for the chord, or one after another for an arpeggio.
Inversions
The same notes in a different order: the lowest note changes, the chord stays A7. Inversions let you move between chords with small steps.
Root position
A – C♯ – E – G · RH 1 2 3 5 · LH 5 3 2 1
1st inversion
C♯ – E – G – A · RH 1 2 3 5 · LH 5 3 2 1
2nd inversion
E – G – A – C♯ · RH 1 2 4 5 · LH 5 3 2 1
3rd inversion
G – A – C♯ – E · RH 1 2 3 5 · LH 5 4 2 1
Which keys use A7
In these keys the chord is built from the notes of the scale itself:
Other A chords
A majorA minorA diminishedA augmentedA sus2A sus4A6A major seventhA minor seventhA diminished seventhA half-diminished
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