F
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D
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Eb Whole-Half Diminished Scale notes: Eb F Gb Ab Bbb Cb C D. Formula: 1 2 b3 4 b5 b6 6 7. Chords that fit it: Ebdim, Ebdim7.
The whole-half diminished scale alternates whole and half steps: 1 2 b3 4 b5 b6 6 7. It is the natural choice over diminished 7 chords and shows up in jazz, film scores and fast metal runs. Like every diminished scale it repeats every three frets, so there are only three different ones.