The A#m/C# (A sharp minor over C sharp) chord is an A# minor chord, with the C# (the b3) as the bass note.
The chord is also referred to as A#m over C#, or A#m ‘slash’ C#, or simply, A sharp minor with a C sharp in the bass.
Technically, the A# minor chord with the C# in the bass is a second inversion A# minor chord.
Some A#m/C# Chord Theory and Info
- The A#m/C# chord contains the notes C#, A# and E#.
- It is an A sharp minor chord with a C# in the bass.
- The root note of A#m/C# is A#, the bass note is C#.
- The A#m/C# chord is very similar to the C#6 chord, and they are often used interchangeably. The only difference between the two chords is that the C#6 chord can also include the G# note, which is the 5th of C#. Including the G# note in A#m/C# would make it an A#m7/C#, as the G# is the b7 note.