B♭ Dominant 13th Sharp 11
Bb13#11 · Root
Every chord tone stacked from the root up.
Click keys to experiment with the chord
B♭ – D – F – A♭ – C – E – G
1 – 3 – 5 – b7 – 9 – #11 – 13
A Lydian-dominant extension useful for a bright V chord or a sustained dominant sonority. Piano voicings commonly omit the 5th and sometimes the root; the 3rd, b7, and #11 establish the sound, with resolution depending on the harmonic context.