ChordB♭7♭135-string bass · Standard B♭ dominant seventh flat thirteen · Frets 11–13 BEADG11R5♭73♭13noteB♭FA♭DG♭roleR5♭73♭13fret1113111211frets 11–13C0C1C2C3C4RootB♭1stD2ndF3rdA♭ StrumArpeggio