# Add9 chords

> An add9 chord is a major triad with the ninth added while the third stays. It still sounds major, but with a shimmer a plain triad cannot produce, which is why it turns up constantly in acoustic pop and modern songwriting.

An add9 chord takes a plain triad and adds the ninth (the second scale degree, an octave up) while keeping the third. The result still sounds major, but with a shimmer that a plain major chord cannot produce — this is the sound of acoustic pop, worship music and a large amount of 1990s and 2000s songwriting.

The shapes are small edits of chords you already know, which is why add9 chords show up in beginner songbooks even though their names look complicated: Cadd9 is C with one finger moved, Eadd9 adds a note to E, and Fadd9 is a four-string shape with no barre at all.

In songwriting they are what you reach for when a plain triad sounds too plain. They keep the major quality, so they work anywhere a major chord works — swap C for Cadd9 in almost any progression and the song still functions, it just sounds more open. That substitutability is the whole appeal: no new harmonic rules, a different texture.

The difference between an add9 and a plain major chord is one note, and that note is usually the highest one you play. It is also the first note to vanish if a finger rolls flat, so check the top string separately before you blame the whole shape.

Do not confuse add9 with sus2. A sus2 replaces the third; an add9 keeps it and stacks the ninth on top. That is why a sus2 sounds unresolved and an add9 sounds like a finished major chord wearing a brighter coat.

The family is small — 6 shapes, 2 of them open — because add9 chords are a colour rather than a system. Learn Cadd9 first: it is the one you will meet most often, and it appears in one of the most-played acoustic songs ever written.

## All shapes

| Symbol | Name | Notes | Frets | Link |
| --- | --- | --- | --- | --- |
| Cadd9 | C add 9 | C E G D | x 3 2 0 3 3 | https://openguitarchords.com/chords/c-add-9 |
| Gadd9 | G add 9 | G B D A | 3 x 0 2 0 3 | https://openguitarchords.com/chords/add9-chords#g-add-9 |
| Dadd9 | D add 9 | D A D E F# | x x 0 2 3 0 | https://openguitarchords.com/chords/d-add-9 |
| Eadd9 | E add 9 | E B E G# B F# | 0 2 2 1 0 2 | https://openguitarchords.com/chords/e-add-9 |
| Aadd9 | A add 9 | A E A B C# E | x 0 2 4 2 0 | https://openguitarchords.com/chords/add9-chords#a-add-9 |
| Fadd9 | F add 9 | F A C G | x x 3 2 1 3 | https://openguitarchords.com/chords/f-add-9 |

## Practice

1. Play C, then Cadd9, then C again. The ninth is usually the top note, so listen there: if the shimmer vanishes, a finger has rolled flat.
2. Swap Cadd9 in for C in a progression you already play. The song still works, it just sounds more open, and that substitutability is the whole point of the family.
3. Play Cadd9 then Csus2 back to back. One keeps the third and one replaces it, and hearing that difference is how you stop confusing the two names.

## Practical use

Learn the open add9 shapes for the keys you actually play in. They are one-finger variations of chords you already know, and they are the difference between an acoustic part that sounds like a beginner strumming and one that sounds arranged.

Canonical page: https://openguitarchords.com/chords/add9-chords