ChordA♭–D♭–G♭–BBass · Standard A♭ quartal chord, four notes · also A♭m7(add11), no 5th · Fret 4 EADG4R4♭7♯9noteA♭D♭G♭BroleR4♭7♯9fret4444fret 4C1C2C3C4Fourths, stacked on the first note in its name StrumArpeggio