piano scale
G harmonic major
G1A2B3C4D5E♭♭6F♯7
Major with a flattened sixth: the mirror of harmonic minor, and the reason a major key can borrow a minor subdominant.
Written out
Every accidental is written in, rather than left to a key signature, so the letters can be read one at a time.
The step pattern
GWAWBHCWDHE♭W+HF♯HG
What is true of it
G harmonic major is G, A, B, C, D, E♭ and F♯, and back to G.
Its steps are W – W – H – W – H – W+H – H, where W is a whole step and H a half.
On the same tonic, G major differs from it by exactly one note.
Chords made only of these notes
Found by testing every chord in the catalogue against these 7 sounds, not chosen.
Other scales on G
C harm majC♯ harm majD♭ harm majD harm majD♯ harm majE♭ harm majE harm majF harm majall 374