guitar scale
C harmonic major
C1D2E3F4G5A♭♭6B7
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
CWDWEHFWGHA♭W+HBHC
What is true of it
C harmonic major is C, D, E, F, G, A♭ and B, and back to C.
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, C 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
CmajorCaugaugmentedCmaj7major seventhDdimdiminishedDm7♭5half-diminished seventhEmajorEmminorEaugaugmented
Found by testing every chord in the catalogue against these 7 sounds, not chosen.
Other scales on C
C♯ harm majD♭ harm majD harm majD♯ harm majE♭ harm majE harm majF harm majF♯ harm majall 374