x 1 0 3 1 x
A#add9
Notes: A# · C## · E# · B#
More common: Bbadd9
Triads
Suspended
Sevenths
Extensions
Other shapes (42)
Showing 12 of 42
6 5 0 5 x x
x 1 0 x 1 1
x 1 0 3 1 1
6 5 0 5 6 x
6 3 0 3 x x
6 3 0 5 x x
6 3 0 3 3 x
6 3 0 5 3 x
6 3 0 3 6 x
6 5 0 5 3 x
6 3 0 5 6 x
About A#add9
A#add9 is built from four notes: A# (root), C## (major third), E# (perfect fifth) and B# (ninth). In scale degrees above the root, the formula is 1 – 3 – 5 – 9. The added ninth gives the major chord an open, modern color, widely used in pop and rock.
A#add9 has no standard open shape in the CAGED system, so its 42 voicings are sorted only by difficulty and position on the neck. Another way to write A#add9 is Bbadd9 (the same piano key, with a different name). The usual choice is Bbadd9.