piano scale
A harmonic major
A1B2C♯3D4E5F♭6G♯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
AWBWC♯HDWEHFW+HG♯HA
What is true of it
A harmonic major is A, B, C♯, D, E, F and G♯, and back to A.
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, A 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 A
C harm majC♯ harm majD♭ harm majD harm majD♯ harm majE♭ harm majE harm majF harm majall 374