B♭dim7+♯1+♭1

B flat diminished seventh, add sharp root, add flat root

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MSK 007 Leapfrog VCF (patch; see in online store)
MSK 009 Coiler VCF (patch; see in online store)

Equivalent chord symbols: A9+♯1, A9+♭2, A9+♭9.

Notes in this chord: B♭♭, B♭, B, D♭, F♭, A♭♭. Integer notation: {1, 4, 7, 9, 10, 11}.

Nearby chords (one less note): A9, A9♭9, A+2+♯1, Em+4+♯4, B♭dim7+♯1, Gdim+2+♯3.

Nearby chords (one more note): A11+♯1, A9+♯1+♯2, A9+♯1+♯5, A9+♯1+♯7, A11♯11+♯1, G♭11♯9+♯1.

Parallel chords (same structure, different root): Cdim7+♯1+♭1, Ddim7+♯1+♭1, Edim7+♯1+♭1, Fdim7+♯1+♭1, Gdim7+♯1+♭1, Adim7+♯1+♭1, Bdim7+♯1+♭1, D♭dim7+♯1+♭1, E♭dim7+♯1+♭1, G♭dim7+♯1+♭1, A♭dim7+♯1+♭1.

Experimental fretting charts for guitar standard EADGBE tuning (change tuning or instrument):

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