ChordB♭–E♭–A♭–D♭HardMandolin · Standard B♭ quartal chord, four notes · also B♭m7(add11), no 5th · Frets 9–15 GDAE9R4♭7♭3noteB♭E♭A♭D♭roleR4♭7♭3fret1513119frets 9–15C3C4C5C6C7Fourths, stacked on the first note in its name StrumArpeggio