C#9 sus chord

C#9 sus chord for piano with keyboard diagram.
Explanation: The C#9sus4 is a five-note chord (although the fifth is sometimes omitted).
Theory: The C#9sus4 is an suspended ninth chord with the third replaced by a perfect four. C#9sus4 is the same as C#11 without the major third (F).

C#9sus4

C#9sus4 chord diagram
Notes: C# - F# - G# - B - D#

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C# chord categories

C# C#m C#7 C#m7 C#maj7 C#mM7 C#6 C#m6 C#6/9 C#5 C#9 C#m9 C#maj9 C#11 C#m11 C#13 C#m13 C#maj13 C#add C#7-5 C#7+5 C#sus C#dim C#dim7 C#m7b5 C#aug C#aug7