About the Gaug chord
To play G augmented, use the first shape above. Place your index finger on the 2nd fret of the A string, your middle finger on the 3rd fret of the C string, and your ring finger on the 3rd fret of the E string. Leave the G string open. Strum all four strings and check that each one rings cleanly.
Root
G
Quality
Augmented
Notes
G · B · D#
How the Gaug chord works
G
Root(1)
The home note. It gives the chord its name.
B
Major third(3)
The major-third interval that establishes the chord's major base.
D#
Augmented fifth(♯5)
A raised fifth that expands the triad.