Short answer: A#Øb9 is a A# Ø♭9 chord containing the notes A♯, C♯, E, G♯, B. It has 4 inversions. Use the diagrams below to learn each voicing on the keyboard.
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Notes: A♯, C♯, E, G♯, B
Notes: C♯, E, G♯, A♯, B
Notes: E, G♯, A♯, B, C♯
Notes: G♯, A♯, B, C♯, E
A#Øb9 is a A# Ø♭9 chord. It contains the notes A♯, C♯, E, G♯, B. On piano, play these notes simultaneously to sound the chord.
To play A#Øb9 on piano, press the keys A♯, C♯, E, G♯, B together. The root position uses these exact notes. There are 4 inversions available, each rearranging the same notes in a different order.
The A#Øb9 chord contains the notes: A♯, C♯, E, G♯, B.
A#Øb9 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.