G Add 9
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Gadd9
G – B – D – A
Formula:R-M3-P5-M9
Intervals:P1-M3-P5-M9
Scale Degrees:1-3-5-9
Introduction
The G Add 9 chord is a four-note chord made up of G, B, D, and A. It is built from a root, major third, perfect fifth, and major ninth.
Notes
G Add 9 Inversions
| Position | Notes |
|---|---|
| Root Position | G – B – D – A |
| 1st Inversion | B – D – G – A |
| 2nd Inversion | D – G – A – B |
| 3rd Inversion | G – B – D – A |
Key Signature
The key of G Add 9 has 1 sharp.
F♯
Order of sharps
Sharps are added to a key signature in a fixed order. Each new sharp key adds the next sharp on the list.
F♯C♯G♯D♯A♯E♯B♯
Mnemonic: Father Charles Goes Down And Ends Battle
Chords in the Key of G Major
These are the diatonic triads built on each degree of the G major scale:
C
D
E
F
G
A
B
C
D
E
F
G
A
B
I — G Major (major)
Theory: Intervals
Formula: R-M3-P5-M9
Intervals: P1-M3-P5-M9
The G Add 9 is built by stacking intervals from the root note. The formula R-M3-P5-M9 describes the scale degrees used. The intervals P1-M3-P5-M9 show the distance between each note in the chord.
G Add 9 — Frequently Asked Questions
What notes are in the G Add 9 chord?
The G Add 9 chord (Gadd9) contains four notes: G (root), B (major third), D (perfect fifth), and A (major ninth). No seventh — the ninth adds brightness and openness to the triad.
How does Gadd9 differ from G9?
Gadd9 has no seventh. G9 includes the minor seventh (F). Gadd9 sounds bright and open; G9 sounds bluesy and dominant.
How is Gadd9 used in music?
Gadd9 is one of the most popular chords in acoustic pop and rock. G Major is the most common guitar key, and adding the ninth creates the bright, jangly sound heard in countless hits.
What songs use add9 chords?
Wonderwall (Oasis) features Gadd9-like shapes prominently. Good Riddance (Green Day), Yellow (Coldplay), and many acoustic songs use add9 voicings for their bright, open quality.
How does Gadd9 differ from Gsus2?
Both contain G and A. Gadd9 keeps B (major third); Gsus2 replaces it. Gadd9 is major with colour; Gsus2 is ambiguous.
Can I substitute Gadd9 for G Major?
Yes — Gadd9 replaces G Major beautifully in pop, rock, and folk. It is one of the most common substitutions in modern music.
Practice Tips
- Play G Major then add A above — instant brightness and shimmer.
- Gadd9 may be the most popular add9 chord in all of pop music — learn it early and use it often.
- Try the classic progression: Gadd9 → Cadd9 → Em7 → D for an acoustic pop foundation.
- Compare Gadd9 with Gsus2 — the major third (B) gives Gadd9 its clear major identity.
- Practice Gadd9 with A on top for maximum ring and brightness.
- Gadd9 → G → Gadd9 creates a subtle movement that works perfectly as a verse accompaniment pattern.
Related Tools
Chord FinderLook up any chord — see the notes, hear it, and play along.Chord DrillTimed drills to build speed and recognition across all chord types.Practice RoomPlug in a MIDI keyboard and get real-time feedback on every chord and scale.Circle of FifthsVisualize key relationships, relative minors, and key signatures.MIDI MonitorLive MIDI message stream with note names, velocity, and a scrolling staff.