piano scale
D♭ Hungarian minor
Harmonic minor with a raised fourth, which puts a second augmented second in the middle of the scale.
The same sounds spelled from the other side are C♯ Hungarian minor.
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
What is true of it
D♭ Hungarian minor is D♭, E♭, F♭, G, A♭, B♭♭ and C, and back to D♭.
Its steps are W – H – W+H – H – H – W+H – H, where W is a whole step and H a half.
Written correctly it needs 6 alterations, B♭♭ among them. That is what the letters force, and it is also why nobody writes music in this key: the same notes spelled from the other side are easier to read.
On the same tonic, D♭ harmonic minor 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 D♭
C hung minD hung minD♯ hung minE♭ hung minE hung minF hung minF♯ hung minG♭ hung minall 374