guitar chord
A♯m7
Minor triad with a minor seventh. The same four notes as a major sixth chord a third above.
Written the other way round it is B♭m7 — the same twelve keys on a piano, a different piece of notation.
Every fingering that fits a hand
686666
moderate · barre
x13121
moderate · barre
68666x
moderate · barre
686669
moderate · barre
686696
moderate · barre
What is true of it
A♯m7 is A♯, C♯, E♯ and G♯ — 1, b3, 5 and b7 counted from A♯.
These are also the notes of C♯6/A♯ and D♭6/A♯. Which name is right depends on what is underneath and what came before — the notes alone do not decide.
On an instrument that cannot reach all 4, the 5 goes first, in that order.
The easiest of the 5 fingerings below is 686666: 2 fingers, one of them barring the 6th fret, held at the 6th fret.
None of them uses an open string, so this chord moves up the neck unchanged — the same shape 1 fret higher is the chord a semitone above.
Where its notes are on the neck
The brass dots are A♯, the root. Everything else is a chord tone with its degree printed in it.
With a different note underneath
A♯m7/C♯
x4636x
A♯m7/E♯
113121
A♯m7/G♯
xx6666
An inversion is the same chord with a different note lowest. The name changes to a slash name because the bass is what a listener hears as the foundation.