A7-9 (A7b9) altered chord

Altered A chord for piano presented by keyboard diagrams.
Explanation: The A7-9 alter the A9 by the change of one note. The chord name can also be written as A7b9 or A7(b9).
Theory: The A7-9 are identical with the A9 except that the major ninth is flattenedThe tone is one half step lower.


A7-9 chord diagram
Notes: A - C# - E - G - Bb

Ab7-9 chord ‹ Previous • Next › A#7-9 chord

See also A7+9 chord ›

A chord categories

A Am A7 Am7 Amaj7 AmM7 A6 Am6 A6/9 A5 A9 Am9 Amaj9 A11 Am11 A13 Am13 Amaj13 Aadd A7-5 A7+5 Asus Adim Adim7 Am7b5 Aaug Aaug7