A# Minor (A#m)
Also written as Bb Minor (Bb and A# are the same key).
1+b3+5
Notes in A# Minor
A# (root)C#E#
Inversions
Same notes as A# Minor, with a different chord tone as the lowest note. Useful for smoother movement between chords instead of jumping around the keyboard.
Root position
A# in the bass
1st inversion
C# in the bass
2nd inversion
E# in the bass
Play A#, C# and E# together and you get A# Minor.
Shrink the major third by a semitone and the same stable shape turns melancholy. A minor triad still resolves, it just carries a heavier, more introspective mood than its major counterpart. Sad songs lean on it constantly, but so do tense film cues and moody grooves, so treat the label as a starting point rather than the whole story.