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An add chord is a standard triad with one extra note added, usually the 2nd, 4th or 6th, without including the seventh. The most common example in pop and rock music is the add9 chord.
What is an add chord?
The word “add” simply means that an extra note has been added to a basic major or minor chord. For example, a C(add9) chord contains the notes C – E – G – D.
Unlike a C9 chord, an add9 chord does not include the seventh (Bb). This gives the chord a cleaner, more open sound with less harmonic tension.
How are add chords used in piano playing?
Add9 chords are among the most popular colour chords in modern pop, rock and worship music. They create a rich, spacious sound while remaining simple to play.
For many piano players, an add9 chord is an easy way to make familiar chord progressions sound more modern. In many cases, you simply add the ninth to an ordinary major chord, creating a fuller and more expressive harmony without making the chord difficult to play.