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