ChordB♭7♭9♭135-string bass · Standard B♭ dominant seventh flat nine flat thirteen · Open position BEADG♭13R♭7noteC♭Same note as BG♭B♭DA♭role♭9♭13R3♭7fret02101frets 1–2C0C1C2C3C4RootB♭1stD2ndF3rdA♭ StrumArpeggio