Piano chord

A Add9 Chord

Aadd9 is an add9 chord built on A. It contains the notes A – C♯ – E – B.

Aadd9

Also written: Aadd2

A

E

B

C♯

Notes in Aadd9

Count up from A using the intervals below. The formula shows each note relative to the A major scale.

Notes	Intervals	Formula	Semitones
A	Root	1	0
C♯	Major 3rd	3	4
E	Perfect 5th	5	7
B	Major 9th	9	14

Right hand: fingers 1–2–3–5 (thumb on A).
Left hand: fingers 5–3–2–1, or play just the root in the left hand and the other notes in the right.
Inversions keep your hand closer to the previous chord — see below.

A major chord with the 9th added above — full and lush without the 7th's jazziness. A staple of modern pop and rock.

Sound: Lush & modern

Aadd9 is built only from notes of these keys. The Roman numeral shows its role in each key.

Hear Aadd9 with different sounds and compare it with other chords in the interactive builder.

If chords sound sour even when you play the right notes, the piano is probably out of tune. Our technicians tune pianos across Israel.