Its key signature has five flats.

Its enharmonic equivalent, A-sharp minor, which would contain seven sharps, is not normally used.

The B-flat natural minor scale is: Changes needed for the melodic and harmonic versions of the scale are written in with accidentals as necessary.

The B-flat harmonic minor and melodic minor scales are: The scale degree chords of B-flat minor are: B-flat minor is traditionally a 'dark' key.

[1] The old valveless horn was barely capable of playing in B-flat minor: the only example found in 18th-century music is a modulation that occurs in the first minuet of Franz Krommer's Concertino in D major, Op.