F add chords
F add chords for piano with keyboard diagram.
Explanation: The Fadd9 and Fadd2 are four note chords. Fadd2 is sometimes written as F2.
Theory: Both chords contain the same notes, but the added notes belong to different octaves which are the ninth and the second notes in the scale.
Notes: F - A - C - G
Notes: F - G - A - C