B♭ Dominant 7th Flat 13
Bb7b13 · Root
Every chord tone stacked from the root up.
Click keys to experiment with the chord
B♭ – D – F – A♭ – G♭
1 – 3 – 5 – b7 – b13
Sometimes distinguished from 7#5 in certain voicing contexts — the natural 5th is retained alongside the b13.
The Bb7b13 chord sounds distinctive, with a dominant 7th flat 13 character. Its notes are Bb, D, F, Ab, Gb. This chord is commonly heard in jazz.