Short answer: C7b9 is a C 7♭9 chord containing the notes C, E, G, B♭, D♭. It has 4 inversions. Use the diagrams below to learn each voicing on the keyboard.
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Notes: C, E, G, B♭, D♭
Notes: E, G, B♭, C, D♭
Notes: G, B♭, C, D♭, E
Notes: B♭, C, D♭, E, G
C7b9 is a C 7♭9 chord. It contains the notes C, E, G, B♭, D♭. On piano, play these notes simultaneously to sound the chord.
To play C7b9 on piano, press the keys C, E, G, B♭, D♭ together. The root position uses these exact notes. There are 4 inversions available, each rearranging the same notes in a different order.
The C7b9 chord contains the notes: C, E, G, B♭, D♭.
C7b9 has 4 inversions. Each inversion rearranges the notes so a different note is at the bottom. The root position starts with the root note, the first inversion moves it to the top, and so on.