A flat dominant seventh

music notation
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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: G♯7, A♭6♯6, Cdim6, Cm6♭5, G♯6♯6, B♯dim6.

Notes in this chord: A♭, C, E♭, G♭. Integer notation: {0, 3, 6, 8}.

Keys in which this chord fits with this spelling: D♭M, B♭m

Keys in which this chord fits with enharmonic spelling: C♯M, A♯m

Nearby chords (one less note): A♭, Cdim, E♭m4, G♭sus2♭5.

Nearby chords (one more note): A♭9, A♭7+4, A♭7+6, A♭9♯9, A♭9♭9, A♭7+♯4, A♭7+♯5, A♭7+♯7.

Parallel chords (same structure, different root): C7, D7, E7, F7, G7, A7, B7, C♭7, D♭7, E♭7, F♭7, G♭7, B♭7, C♯7, D♯7, E♯7, F♯7, G♯7, A♯7, B♯7.

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