ChordB♭13sus47-string bass · Standard B♭ thirteenth suspended fourth · Open position BEADGCFR4♭713noteB♭E♭A♭CGroleR4♭7913fret11102frets 1–2C0C1C2C3C4C5RootB♭1stE♭2ndF3rdA♭ StrumArpeggio