A#/Bb11b9 guitar chord (A#/Bb Dominant 11th, Flat 9th)

Symbols: 11b9, 7sus4(b9)

Steps: 1-5-b7-b9-11

Notes: A#-F-Ab-B-D#

The A#/Bb 11b9 chord adds a flat ninth to the dominant 11th, resulting in a suspenseful and tension-filled tone. With notes A#, F, Ab, B and D#, it's often used in jazz to create a rich, dissonant atmosphere. Below, you'll find four variations how to play the "A#/Bb 11b9" chord, each featuring finger placements and an audio sample.

Variation 1

Barre the 1st fret with your index finger, extending over the 3rd to the 5th strings
Strum from the 5th string to the 2nd strings

Variation 2

Apply a barre with your index finger across the 4th fret, covering the 2nd to the 3rd strings
Position your pinky on the D (4th) string at the 6th fret and press down
With your ring finger, press down on the low E (6th) string at the 6th fret
Now, strum all the strings up to the 2nd string, mute the 5th string

Variation 3

With your index finger, press down on the E (1st) string at the 7th fret
Use your pinky to press the B (2nd) string down on the 9th fret
Press down on the G (3rd) string at the 8th fret using your ring finger
Position your middle finger on the D (4th) string at the 8th fret and press down
Now, strum all the strings starting from the 4th string

Variation 4

Press the B (2nd) string on the 12th fret with your index finger
Press down on the G (3rd) string at the 13th fret using your pinky
Position your ring finger on the D (4th) string at the 13th fret and press down
With your middle finger, press down on the A (5th) string at the 13th fret
Strum from the 5th string to the 2nd strings

Other A#/Bb Chords