Bb7-9 (Bb7b9) altered chord

Altered Bb chord for piano presented by keyboard diagrams.
Explanation: The Bb7-9 alter the Bb9 by the change of one note. The chord name can also be written as Bb7b9 or Bb7(b9).
Theory: The Bb7-9 are identical with the Bb9 except that the major ninth is flattenedThe tone is one half step lower.

Bb7-9

Bb7-9 chord diagram
Notes: Bb - D - F - Ab - Cb

A7-9 chord ‹ Previous • Next › B7-9 chord

See also Bb7+9 chord ›

Bb chord categories

Bb Bbm Bb7 Bbm7 Bbmaj7 BbmM7 Bb6 Bbm6 Bb6/9 Bb5 Bb9 Bbm9 Bbmaj9 Bb11 Bbm11 Bbmaj11 Bb13 Bbm13 Bbmaj13 Bbadd Bb7-5 Bb7+5 Bbsus Bbdim Bbdim7 Bbm7b5 Bbaug Bbaug7