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Fig. 1 · Amaj9 on the keyboard

piano chord

Amaj9

A1C♯3E5G♯7B9

A major seventh with a ninth on top.

on guitaron ukulelethe scale

What is true of it

Amaj9 is A, C♯, E, G♯ and B — 1, 3, 5, 7 and 9 counted from A.

On an instrument that cannot reach all 5, the 5 and 1 go first, in that order.

A in other shapes

Aadd9added ninthA9dominant ninthAm9minor ninthAmajorAmminorAdimdiminished

Cmaj9C♯maj9D♭maj9Dmaj9D♯maj9E♭maj9Emaj9Fmaj9all 374