guitar scale
D harmonic major
D1E2F♯3G4A5B♭♭6C♯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
DWEWF♯HGWAHB♭W+HC♯HD
What is true of it
D harmonic major is D, E, F♯, G, A, B♭ and C♯, and back to D.
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, D major differs from it by exactly one note.
Across the first twelve frets of the guitar its notes fall in 47 places, which is what makes a scale a shape rather than a list.
Chords made only of these notes
C♯dimdiminishedDmajorDaugaugmentedDmaj7major seventhEdimdiminishedEm7♭5half-diminished seventhF♯majorF♯mminor
Found by testing every chord in the catalogue against these 7 sounds, not chosen.
Other scales on D
C harm majC♯ harm majD♭ harm majD♯ harm majE♭ harm majE harm majF harm majF♯ harm majall 374