B♯+♭1

B sharp major, 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: CM7, Em6, B♯M7, C+♭1, C7♯7, F♭m6.

Notes in this chord: B, B♯, D♯♯, F♯♯. Integer notation: {0, 4, 7, 11}.

Keys in which this chord fits with enharmonic spelling: CM, GM, B♯M, Em, Am, F♭m

Nearby chords (one less note): C, Em, G4, E5+♯5.

Nearby chords (one more note): Am9, CM9, C7+♯7, C+4+♭1, C+♯1+♭1, C+♯2+♭1, C+♯4+♭1, E+♯2+♯5.

Parallel chords (same structure, different root): C+♭1, D+♭1, E+♭1, F+♭1, G+♭1, A+♭1, B+♭1, C♭+♭1, D♭+♭1, E♭+♭1, F♭+♭1, G♭+♭1, A♭+♭1, B♭+♭1, C♯+♭1, D♯+♭1, E♯+♭1, F♯+♭1, G♯+♭1, A♯+♭1.

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

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