C♯9
9 · C♯ – F – G♯ – B – D♯
- C♯R
- F3
- G♯5
- B♭7
- D♯9
Guitar voicings
Piano
- Root
- Third / sus
- Fifth
- Sixth / seventh
- Extension
About the C♯9 chord
The C♯9 chord (9) is built from C♯ (the root), F (a major third), G♯ (a perfect fifth), B (a minor seventh) and D♯ (a ninth). Ninth chords extend the dominant seventh into a rich, funky sound at home in funk and jazz.