Added 9th Chord
The add9 chord adds a ninth (octave + second) to a major triad without including the seventh. It has a bright, open sound, richer than a plain major chord but less complex than a major ninth.
Symbol: add9, add2
Formula: 1-3-5-9
C Added 9th Chord: C – E – G – D
Choose a Root
Interval Formula
| Degree | Interval | Semitones from Root | Note (C Added 9th Chord) |
|---|---|---|---|
| 1 | Root (1) | 0 | C |
| 3 | Major 3rd (3) | 4 | E |
| 5 | Perfect 5th (5) | 7 | G |
| 9 | Major 9th (9) | 14 | D |
Related Chords
Common Progressions
- Iadd9-IVadd9
- Iadd9-V