4 3 1 3 x x
Abadd9
Notes: Ab · C · Eb · Bb
Also spelled G#add9
Triads
Suspended
Sevenths
Extensions
Other shapes (25)
Showing 12 of 25
x x 6 5 4 6
4 3 x 3 4 x
4 3 6 3 x x
4 1 1 1 1 x
4 x 1 3 1 x
4 1 x 3 1 x
4 3 x 3 1 x
4 1 1 1 1 4
4 1 1 3 1 x
4 1 1 3 1 4
4 3 1 3 1 x
About Abadd9
The notes of Abadd9 are Ab (root), C (major third), Eb (perfect fifth) and Bb (ninth). In scale degrees above the root, the formula is 1 – 3 – 5 – 9. It is an added-ninth chord: the major chord plus the ninth (the second, an octave higher) with no seventh, and it sounds wide and bright.
Abadd9 has no standard open shape in the CAGED system, so its 25 voicings are sorted only by difficulty and position on the neck. Another way to write Abadd9 is G#add9 (the same piano key, with a different name). Abadd9 is the usual choice.