A#9#11 chord on piano

A Sharp Dominant Ninth Sharp Eleven, also written Bb9#11. Notes: A#, D, F, G#, C and E.

A#9#11 piano chord, root positionC4DFCEA#G#
Root position. Tap any key to hear it.

How to play A#9#11

  1. Find A# just below middle C. That is the root.
  2. Add D, F, G#, C and E above it, skipping the keys in between.
  3. Right hand fingering: 1-2-3-4-5, or split the chord between both hands. Left hand: play the root and fifth, and leave the upper notes to the right hand.

Notes

A#root
D3 · major third
F5 · perfect fifth
G#b7 · minor seventh
C9 · ninth
E#11 · sharp eleventh

Notes and theory

A#root
D3 · major third
F5 · perfect fifth
G#b7 · minor seventh
C9 · ninth
E#11 · sharp eleventh

The 9#11 is a dominant ninth with a raised eleventh, the Lydian dominant sound used in jazz. The formula is 1 3 5 b7 9 #11. Strictly by music theory the notes are spelled A#, C##, E#, G#, B# and D##; C## is the same key as D, E# is the same key as F, B# is the same key as C and D## is the same key as E.

More A# chords

All A# piano chords

dominant ninth sharp eleven chords in every key

Questions

What notes are in the A#9#11 chord?

A#9#11 (A sharp dominant ninth sharp eleven) is made of six notes: A# (root), D (major third), F (perfect fifth), G# (minor seventh), C (ninth) and E (sharp eleventh).

How do you play A#9#11 on piano?

Play A#, D, F, G#, C and E together. With the right hand use fingers 1-2-3-4-5, or split the chord between both hands; with the left hand use play the root and fifth, and leave the upper notes to the right hand.

What does a dominant ninth sharp eleven chord sound like?

The 9#11 is a dominant ninth with a raised eleventh, the Lydian dominant sound used in jazz.