A9 (A dominant 9th): A C# E G B. Formula 1 3 5 ♭7 9. A dominant 7th with a 9th: full and funky, the chord of funk and soul vamps.

Made of5

Notes5

Contains & part of9

Scales that contain it9

Inversions5

  • A9

    Root position · A C# E G B

  • A9/C#

    1st inversion · C# E G B A

  • A9/E

    2nd inversion · E G B A C#

  • A9/G

    3rd inversion · G B A C# E

  • A9/B

    4th inversion · B A C# E G

Relatives6

Type1

Genres that use it5

Where it goes3

One small move away2

Its dominant1