C9 sus chord
C9 sus chord for piano with keyboard diagram.
Explanation: The C9sus4 is a five-note chord (although the fifth is sometimes omitted).
Theory: The C9sus4 is an suspended ninth chord with the third replaced by a perfect four. C9sus4 is the same as C11 without the major third (E).
Notes: C - F - G - Bb - D
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