ChordA(♯4)Lydian6-string bass · Standard A major with sharp four, no fifth, from A Lydian · Open position BEADGC♯4R3noteAD♯AC♯roleR♯4R3fret0121frets 1–2C0C1C2C3C4C5RootA1stC♯2ndD♯ StrumArpeggio