C sharp suspended fourth flat ninth piano chord - C#b9sus

The C sharp suspended fourth flat ninth chord is a 5-note chord consisting of the notes C#, F#, G#, B and D.
You can see these notes highlighted in the interactive piano chart below.
The chord itself is often abbreviated as C#b9sus.

Interactive piano diagram for the C sharp suspended fourth flat ninth chord

Piano keyboard displaying the C sharp suspended fourth flat ninth chord with the notes CbBC#DbF#GbG#AbD

Reduced chords

Chords that are a subset of C#b9sus. These contain less notes but all of them are included in C#b9sus.

Scales with C#b9sus

Below you find all scales that include C#b9sus:

  • phrygian
  • dorian b2
  • phrygian dominant
  • spanish heptatonic
  • bebop locrian
  • chromatic

C sharp suspended fourth flat ninth 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 C#b9sus chord. Feel free to save or share the image as needed.

Piano chord chart for the C sharp suspended fourth flat ninth chord (C#b9sus). The notes C#, F#, G#, B and D are highlighted.