G flat diminished, add fourth

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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: A2+6+♯2, F♯dim+4, F♯dim+11, F♯dim+♭5, G♭dim+11, G♭dim+♭5.

Notes in this chord: G♭, B♭♭, C♭, D♭♭. Integer notation: {0, 6, 9, 11}.

Keys in which this chord fits with this spelling: F♭m

Keys in which this chord fits with enharmonic spelling: GM, Em

Nearby chords (one less note): G♭m4, A2+♯2, G♭dim, Bsus2♭2.

Nearby chords (one more note): B9♭9, D7+6, Am9♭7, F+♯1+♯4, G♭m+4+♯4, G♭♭5+4+♯2, G♭dim+2+4, G♭dim+4+♯1.

Parallel chords (same structure, different root): Cdim+4, Ddim+4, Edim+4, Fdim+4, Gdim+4, Adim+4, Bdim+4, C♭dim+4, D♭dim+4, E♭dim+4, F♭dim+4, A♭dim+4, B♭dim+4, C♯dim+4, D♯dim+4, E♯dim+4, F♯dim+4, G♯dim+4, A♯dim+4, B♯dim+4.

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