Learn › Gadd9 Chord on Piano (G Add 9)
New Released in April 2026
Gadd9 Chord on Piano (G Add 9)
The G add 9 chord (Gadd9) uses the piano keys G, B, D and A: the major triad G plus the 9th, A, with no seventh in between. Its sound: wide and shiny, a major chord with a ring on top.
No account, no download. The demo has limited content. Advanced features are in ChordRunner Premium.
- MIDI keyboard
- Digital or acoustic piano
- Guitar
- Computer, phone or tablet
A second name for the same keys
Take Gsus2 (G A D) and add the third B: you have Gadd9. That is why Gadd9 still sounds major, while Gsus2 does not.
The formula of Gadd9
Formula 1 3 5 9. Count from G and every number is a step of the G major scale, and a b lowers it by one key.
Start chord: G
| Note | Step | Interval | Keys from G |
|---|---|---|---|
| G | 1 | root | 0 |
| B | 3 | major 3rd | 4 |
| D | 5 | perfect 5th | 7 |
| A | 9 | major 9th | 14 |
Ways to place Gadd9 on the keys
Same notes, different order. Pick the position closest to the chord you just played.
Root position: G A B D
1st inversion: B D G A
2nd inversion: D G A B
Hands and fingers
| Right hand | G A B D | 1 2 3 5 |
|---|---|---|
| Left hand | G A B D | 5 4 3 1 |
A short Gadd9 routine
- Find G, then add the other notes one at a time: G, B, D and A.
- Switch between G and Gadd9 ten times without looking at your hand.
- Alternate root position and 1st inversion, keeping shared notes still.
- Then test it in random order among other chords: recall under time pressure is what sticks.
Keep each session short and frequent and Gadd9 will become automatic.
Keys and moves for Gadd9
- Gadd9 fits wherever G fits: G major, D major and C major.
- Pop and worship songs use it in place of plain G to make a simple progression sound fuller.
Play Gadd9 in a game
Chord symbols arrive one after another and the game checks every note you play, with MIDI or the microphone. Add9 chords come in the level "Sixth & Add Chords".
Play the demoCommon questions
What notes are in the Gadd9 chord?
Gadd9 has 4 notes: G, B, D and A. Formula 1 3 5 9.
Is Gadd9 the same as Gsus2?
No. Gsus2 has no third, Gadd9 adds B, and that one note makes Gadd9 sound major.
Where is Gadd9 used?
Gadd9 fits wherever G fits: G major, D major and C major. Pop and worship songs use it in place of plain G to make a simple progression sound fuller.
Can I practise Gadd9 with a MIDI keyboard or a real piano?
Yes. In ChordRunner a USB MIDI keyboard is detected automatically, and an acoustic or digital piano works through the microphone. The game checks that G, B, D and A sound together.
Your instrument is the controller.
ChordRunner is a browser game that teaches piano and guitar chords: a chord appears on screen, you play it on a real instrument, and your runner jumps. MIDI keyboard or microphone, both work.
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