x 1 3 3 4 x
A#sus4
Notes: A# · D# · E#
More common: Bbsus4
Triads
Suspended
Sevenths
Extensions
Other shapes (25)
Showing 12 of 25
6 6 3 3 x x
x 1 1 3 x 1
x x 8 8 6 6
6 8 8 8 x x
x 1 1 x 4 1
x 1 x 3 4 1
x 1 3 x 4 1
x 1 1 3 4 1
6 x 3 3 4 x
6 6 3 x 4 x
6 6 x 3 6 x
About A#sus4
A#sus4 is built from three notes: A# (root), D# (perfect fourth) and E# (perfect fifth). In scale degrees above the root, the formula is 1 – 4 – 5. It is a suspended chord: it replaces the third with the perfect fourth, which creates a tension that usually resolves to the major chord.
A#sus4 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 A#sus4 is Bbsus4 (the same piano key, with a different name). The usual choice is Bbsus4.