piano scale
B♭ Hungarian minor
B♭1C2D♭♭3E♯4F5G♭♭6A7
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 A♯ 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
B♭WCHD♭W+HEHFHG♭W+HAHB♭
What is true of it
B♭ Hungarian minor is B♭, C, D♭, E, F, G♭ and A, and back to B♭.
Its steps are W – H – W+H – H – H – W+H – H, where W is a whole step and H a half.
On the same tonic, B♭ harmonic minor differs from it by exactly one note.
Chords made only of these notes
D♭augaugmentedFmajorFaugaugmentedFmaj7major seventhG♭majorG♭mminorG♭dimdiminishedG♭7dominant seventh
Found by testing every chord in the catalogue against these 7 sounds, not chosen.
Other scales on B♭
B♭ Phrygian dominantexoticB♭ Lydian dominantexoticB♭ alteredexoticB♭ majormajorB♭ natural minorminorB♭ harmonic minorminor
C hung minC♯ hung minD♭ hung minD hung minD♯ hung minE♭ hung minE hung minF hung minall 374