G Altered at a glance
The Altered scale is the go-to choice over a V7alt chord in jazz. Every note that can be altered on a dominant is altered, making it the most tense and most resolution-hungry scale in the modal canon. Built on the root G, the scale takes on the specific colour and pitch range of that key - making it especially useful in genres and registers where G is a comfortable tonal centre.
| Notes | G A♭ B♭ C♭ D♭ E♭ F |
|---|---|
| Formula | 1P · 2m · 2A · 3M · 4A · 6m · 7m |
| Step pattern | H W H W W W W |
| Chords in the key | G°A♭mB♭mC♭+D♭E♭F° |
Chords in the G Altered scale
These are the chords that naturally form on each degree of the scale. Click a chord to open its dedicated page.
G Altered on the piano
Improvisation drone · G
Loop the root note as a pad to practice improvising over this scale.
On the piano G Altered uses four black keys (A♭, B♭, D♭ and E♭) and three white. C♭ is the white key you'd normally call B.
G · A♭ · B♭ · C♭ · D♭ · E♭ · F
Try G Altered on the virtual piano
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G Altered on the guitar
G Altered - fr 0–12
G Altered on the staff
Notes of the G Altered scale
| Degree | Note | Interval | Semitones | Hear |
|---|---|---|---|---|
| 1 | G | unison1P | 0 | |
| 2 | A♭ | minor 2nd2m | 1 | |
| 3 | B♭ | augmented 2nd2A | 3 | |
| 4 | C♭ | major 3rd3M | 4 | |
| 5 | D♭ | augmented 4th4A | 6 | |
| 6 | E♭ | minor 6th6m | 8 | |
| 7 | F | minor 7th7m | 10 |
What makes G Altered different
The Altered scale is the seventh mode of melodic minor, also called super-Locrian. It's Locrian with a lowered fourth, and that note works as a major third, so the scale holds the 3 and ♭7 of a dominant chord plus every altered tension: ♭9, ♯9, ♯11 and ♭13. It has no natural fifth, and its ♭13 in place of a natural 13th is what separates it from the half-whole diminished scale over the same chord. It shares its notes with the melodic minor scale a half step above its root. On G, G Altered has C♭ where G Locrian has C; every other note is shared with G Locrian (G A♭ B♭ C D♭ E♭ F).
How to use the G Altered scale
The diatonic chords of G Altered are: i° = G°, ii = A♭m, iii = B♭m, IV+ = C♭+, V = D♭, VI = E♭, vii° = F°. These seven chords belong naturally to the key and are the safest harmonic vocabulary when writing songs in G Altered. Each one in the chord table on this page opens its own diagram and progressions.
The Altered scale is the go-to choice over a V7alt chord in jazz. Every note that can be altered on a dominant is altered, making it the most tense and most resolution-hungry scale in the modal canon.
Practice tips
Practise the altered scale exclusively over altered V7 chords. Resolve every altered tone (♭9 → root, ♯9 → ♭3 of the I chord) to feel why this scale is built for tension and release.
Formula & step pattern
The G Altered scale follows the seventh mode of melodic minor — root, ♭9, ♯9, 3, ♯11, ♭13, ♭7, packing every common dominant alteration into one scale. Step pattern: H - W - H - W - W - W - W. Intervals from the root: 1P · 2m · 2A · 3M · 4A · 6m · 7m. Memorising the formula lets you transpose the scale to any other root note quickly.
Where you will hear G Altered
Start with the music described above: listen for G Altered in it and transcribe a few short phrases by ear. It's the quickest way to learn how the scale sounds.
Questions people ask
What notes are in the G Altered scale?
The G Altered scale contains G, A♭, B♭, C♭, D♭, E♭ and F.
What is the formula for the G Altered scale?
G Altered follows the seventh mode of melodic minor — root, ♭9, ♯9, 3, ♯11, ♭13, ♭7, packing every common dominant alteration into one scale.
Is G Altered a major or minor scale?
G Altered is a altered scale. Seventh mode of melodic minor (super-Locrian) — every available alteration on a dominant: ♭9, ♯9, ♯11, ♭13.
What chords belong to the G Altered scale?
The diatonic chords of G Altered are G°, A♭m, B♭m, C♭+, D♭, E♭, F°.
Which genres use G Altered?
The Altered scale is the go-to choice over a V7alt chord in jazz. Every note that can be altered on a dominant is altered, making it the most tense and most resolution-hungry scale in the modal canon.
How do you play the G Altered scale on the piano?
On the piano G Altered uses four black keys (A♭, B♭, D♭ and E♭) and three white. C♭ is the white key you'd normally call B.
What is the difference between G Altered and G Locrian?
On G, G Altered has C♭ where G Locrian has C; every other note is shared with G Locrian (G A♭ B♭ C D♭ E♭ F).
How do I practise the G Altered scale?
Practise the altered scale exclusively over altered V7 chords. Resolve every altered tone (♭9 → root, ♯9 → ♭3 of the I chord) to feel why this scale is built for tension and release.