Ab Dominant 9th Sharp 5
Ab9#5 · Piano chord
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Ab – C – E – Gb – Bb
1 – 3 – #5 – b7 – 9
The raised fifth adds a bright, unsettled color to the dominant ninth. The whole-tone scale fits its sound; this chord commonly resolves to the tonic.
The Ab9#5 chord sounds distinctive, with a dominant 9th sharp 5 character. Its notes are Ab, C, E, Gb, Bb.