Standard
A♭ major second dyad · Frets 3–6
Two notes: the first in its name is the lower
A♭ major second dyad · Frets 3–6
F quartal chord, four notes · also Fm7(add11), no 5th · Fret 1
B♭ minor seventh dyad · Fret 1
B♭ quartal chord, three notes · also B♭7sus4 (no 5th) · Fret 1