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Five for the Hendrix Chord, E7♯9 ;-)

That's E, G♯, B, D, F

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Every jazz player knows you can drop the fifth, and the root too if the bass is filling it in. That gives your fingers room to add even crazier extensions
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Oh man have you seen the Adam Neely video "Seven Level of Jazz Harmony"?

https://www.youtube.com/watch?v=lz3WR-F_pnM

If not, stop and watch it. But make a cup of tea to enjoy with it first, and maybe put a cloth over your keyboard for when you inevitably splutter tea all over it.

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I read a pretty good argument once that this chord should really be called a b10 (no one does though...)
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