A major 9 guitar chords

A - C# - E - G# - B

Chord Theory

Amaj9 chords consist of the 1st, 3rd, 5th, 7th, and 9th notes of the diatonic root scale of A Major.

  • A Major Scale: A - B - C# - D - E - F# - G#
  • Chord: A major ninth - Amaj9 (AM9 or A∆9)
  • Formula: 1 - 3 - 5 - 7 - 9
  • Notes: A - C# - E - G# - B

Amaj9 Chord Charts - RH/LH

Spelling: 1st(A), 3rd (C#), 5th(E), 7th(G#), 9th(B)
1st

Written: x02100
Notes: x-A-E-G#-B-E


 TAB     e |-0-|
         B |-0-|
         G |-1-|
         D |-2-|
         A |-0-|
         E |---|

2nd

Written: 54645x
Notes: A-C#-G#-B-E-x


 TAB     e |---|
         B |-5-|
         G |-4-|
         D |-6-|
         A |-4-|
         E |-5-|

3rd

Written: x-12-11-13-12-0
Notes: x-A-C#-G#-B-E


 TAB     e |-0--|
         B |-12-|
         G |-13-|
         D |-11-|
         A |-12-|
         E |----|

Notes

  • A major 9th chord implies the preceding 1st, 3rd, 5th, 7th, before the added 9th.
  • This could also be written as an Amaj7 hord with an added 9th.
  • In the 1st position chord, the 3rd (C#) is omitted... this is a particular voicing of the major 9th chord. This could also be classed as a maj7sus2 chord, in this case Amaj7sus2. The chord formula is 1-2-5-7 = A-B-E-G# (notes in the first position). Amaj9 is almost identical to Amaj7sus2 except the 9th is played an octave lower (9 - 7 = 2), and the 3rd is omitted. This voicing is quite common with 9th chords.
  • A-major-ninth chords: You tend to find all types of 9th chords in alternativee styles of music, especially jazz music where the use of extended chords and compound intervals are prevalent.
  • Standard keys using the A major 9 chord: A/F#m and E/C#m. Both sets of scales share the same notes, i.e., A Major and F# minor share the same notes, as do E major and C#minor (F#m is the relative minor of A major, and C#m is the relative minor of E major).
  • Amaj9 can therefore be used as a usable chord in any of the above chord progressions which means in this example, chords that utilize notes belonging to the A Major Scale (A-B-C#-D-E-F#-G#), and E Major Scale (E-F#-G#-A-B-C#-D#). Amaj9 meets the criteria (A - C# - E - G# - B)... this also includes the relative minor keys of F#m and C#m.
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