A# Minor 6th (A#m6)
Also written as Bb Minor 6th (Bb and A# are the same key).
Notes in A# Minor 6th
Inversions
Same notes as A# Minor 6th, 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
3rd inversion
G in the bass
Open voicings
A close-position chord like A# Minor 6th can sound cluttered in the middle of the keyboard. Jazz players open it up by dropping one note down an octave, spreading the same notes wider without changing the chord.
Drop 2
E# on the bottom
Drop 3
C# on the bottom
A# Minor 6th is built from A#, C#, E# and G.
A minor triad with a major sixth on top carries a bittersweet color a plain minor chord doesn't have. Composers reach for it when a minor chord needs an extra touch of melancholy without sliding into the more overtly jazzy sound of a minor seventh.