C♯dim chord
Tense and unstable. Both the third and the fifth are flattened, producing a chord that badly wants to move somewhere else.
C♯ diminished · 1 voicing
Notes in C♯dim
How to Play C♯dim
Movable, root on 5th string
x 4 5 6 5 x
Numbers under each diagram are frets, string 6 (thickest) to string 1. x means don't play that string; 0 means play it open.
Where C♯dim Is Used
C♯dim occurs naturally in one major key. Its roman numeral tells you the job it does in each — the same chord feels like home in one key and like tension in another.
| Key | Degree | Role |
|---|---|---|
| D major | vii° | Leading-tone — maximum tension |
Progressions featuring C♯dim
- vii° – I — a tense chord resolving straight home
Playing tips for C♯dim
C♯dimhas no standard open-position shape, so every voicing here is movable — the same finger pattern works at any fret, and sliding it changes the chord's root. Barre with the flat edge of your index finger, slightly rolled toward the headstock, rather than the soft centre of the pad.
If a string buzzes or sounds dead, the usual causes are a fingertip leaning against it, not quite enough pressure, or a finger too far behind the fret. Play each string one at a time to find which one is failing before adjusting the whole shape — and make sure your guitar is in tune first, since an out-of-tune string will make a correct shape sound wrong. Use our free online tuner to check.
Related Chords
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