C#/D♭ 9th suspended 4th chords Author: Juan Martinez Categories: C♯ Chords Tags: 9sus4 chords C#9sus4 chord on a piano Formula: 1-4-5-♭7-9 Notes: C#-F#-G#-B-D# chord suffix: C#9sus4 Use these charts to create your own C#9sus4 chord or play a C#9sus4 melody C#9sus4 chord on a pianoC# 9th suspended 4th chord on a guitar