The A#/D chord is an A# Major chord, with the D (the 3rd) as the bass note. The 3rd of A# is actually the note Cx (‘C double sharp’). However, because Cx is harmonically the same as D, it’s easier to refer to the note as D (even though it’s technically incorrect).
The chord is also referred to as A# over D, or A# ‘slash’ D, or simply, A sharp with a D in the bass.
Technically, the A# Major chord with the D in the bass is a first inversion A sharp Major chord.
Some A#/D Chord Theory and Info
- The A#/D chord contains the notes D (Cx), A# and E#.
- It is an A sharp Major chord with a D in the bass.
- The root note of A#/D is A#, the bass note is D (Cx).
10 Ways to Play the A#/D Chord on Guitar
Here are 10 different ways to play the A#/D chord on the guitar.