E Half-Diminished 9th
Em9b5 · Piano chord
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E – G – Bb – D – F#
1 – b3 – b5 – b7 – 9
The half-diminished ninth is a minor-key ii chord commonly paired with Locrian natural 2.
The Em9b5 chord sounds distinctive, with a half-diminished 9th character. Its notes are E, G, Bb, D, F#.