Bb13b9 chord
Bb13b9 chord for piano presented by keyboard diagrams.
Explanation: The Bb13b9 alter the Bb13 by the change of one note. The B flat thirteenth flat ninth is a seven-note chord, but due to practical circumstances, one or more notes (the fifth primarily) are omitted. The chord name can also be written as Bb13(b9) or Bb13-9.
Theory: Compared to Bb13 the ninth tone in the chord is flattenedThe tone is one half step lower.
Bb13b9

Notes: Bb - D - F - Ab - B - Eb - G
A13b9 chord ‹ Previous • Next › B13b9 chord
Bb13#11 polychord
Explanation: The image below shows a polychord version of the Bb13#11. The chord is played in two parts with both hands.

Polychord Bb7 (LH), C (RH)