ChordB♭7♭138-string · Standard B♭ dominant seventh flat thirteen · Frets 1–3 F♯BEADGBER5♭73♭13noteB♭FA♭DG♭roleR5♭73♭13fret13132frets 1–3C1C2C3C4C5C6RootB♭1stD2ndF3rdA♭ StrumArpeggio