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A# Dominant 7th flat 9th
A#dom7b9
A#7(b9)
A#(b9)
A#7-9
Regular guitar tuning
Can also be seen as
A#7b9/D
C#13b9/D
E7b9#11/D
C#7add13/D
A#7b9(no3)/D
G#min6(add9)/D
Neighbour Chords
A#9
C#7add13
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