piano scale
B♭ melodic minor
B♭1C2D♭♭3E♭4F5G6A7
Minor third, major sixth and seventh — the ascending form, and the parent of most of the altered sounds below.
The same sounds spelled from the other side are A♯ melodic 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♭WE♭WFWGWAHB♭
What is true of it
B♭ melodic minor is B♭, C, D♭, E♭, F, G and A, and back to B♭.
Its steps are W – H – W – W – W – W – H, where W is a whole step and H a half.
On the same tonic, B♭ major differs from it by exactly one note.
Chords made only of these notes
CmminorCm7minor seventhD♭augaugmentedE♭majorE♭7dominant seventhFmajorFaugaugmentedF7dominant seventh
Found by testing every chord in the catalogue against these 7 sounds, not chosen.
Other scales on B♭
C mel minC♯ mel minD♭ mel minD mel minD♯ mel minE♭ mel minE mel minF mel minall 374