ChordB♭(♯4)Lydian7-string bass · Standard B♭ major with sharp four, no fifth, from B♭ Lydian · Open position BEADGCFRnoteEB♭Drole♯4R3fret010fret 1C0C1C2C3C4C5RootB♭1stD2ndE StrumArpeggio