A sharp diminished seventh piano chord - A#dim7

The A sharp diminished seventh chord is a 4-note chord consisting of the notes A#, C#, E and G.
You can see these notes highlighted in the interactive piano chart below.
The chord itself is often abbreviated as A#dim7.

Interactive piano diagram for the A sharp diminished seventh chord

Piano keyboard displaying the A sharp diminished seventh chord with the notes A#BbFbEGC#Db

Reduced chords

Chords that are a subset of A#dim7. These contain less notes but all of them are included in A#dim7.

Scales with A#dim7

Below you find all scales that include A#dim7:

  • ultralocrian
  • locrian 6
  • dorian #4
  • lydian diminished
  • hungarian major
  • lydian #9
  • diminished
  • half-whole diminished
  • composite blues
  • messiaen's mode #7
  • chromatic

A sharp diminished seventh piano chord chart image

In case you prefer a non-interactive variant of the chord chart, we've embedded a PNG image below that shows the notes for the the A#dim7 chord. Feel free to save or share the image as needed.

Piano chord chart for the A sharp diminished seventh chord (A#dim7). The notes A#, C#, E and G are highlighted.