B♭ Major 9th Sharp 11
Bbmaj9#11 · Root
Every chord tone stacked from the root up.
Click keys to experiment with the chord
B♭ – D – F – A – C – E
1 – 3 – 5 – 7 – 9 – #11
This Lydian major-nine sonority works as a stable tonic or IV-chord color rather than requiring dominant resolution. The 5th is a common omission in piano voicings; #11 avoids the close-semitone clash between a major 3rd and natural 11.
The Bbmaj9#11 chord sounds distinctive, with a major 9th sharp 11 character. Its notes are Bb, D, F, A, C, E. This chord is commonly heard in jazz.