C#7sus4 C# seventh suspended fourth chord
- Notes
- C# F# G# B
- Formula
- 1 4 5 b7
- Semitones
- 0 5 7 10 above the root
- Also written
- Db7sus4 (Db Gb Ab Cb)
- Other symbols
- C#7sus
C# to F# is a perfect fourth (5 semitones), F# to G# is a major second (2 semitones), G# to B is a minor third (3 semitones). A dominant seventh with the fourth, F#, in place of the third. Like any sus chord it is neither major nor minor. With B in the bass the same four keys read as C#7sus4/B.
C#7sus4 on the piano
Root position from C#4: C#4, F#4, G#4, B4. Middle C is C4.
C#7sus4 on the guitar
Standard tuning (E A D G B E). Strings run low E on the left to high e on the right, frets downwards; × is a muted string, ○ an open string, and each dot shows the note it sounds, with the root in blue-green. Every shape below has C# as its lowest note.
x 4 6 4 7 4 (low E to high e)
Sounds C#3 G#3 B3 F#4 G#4
9 11 9 11 9 9 (low E to high e)
Sounds C#3 G#3 B3 F#4 G#4 C#5
The E-shape and A-shape grips are movable: an E-shape chord's root is the note under your first finger on the low E string, an A-shape chord's root is the note on the A string. Slide the same grip up or down to play seventh suspended fourth chords on other roots.
Inversions of C#7sus4
An inversion puts a note other than the root in the bass. The name is what semicord's chord finder calls those notes played bottom to top; a slash name like C/E means a C chord with E in the bass.
| Position | Notes, bass first | Named | Listen |
|---|---|---|---|
| Root position | C# F# G# B | C#7sus4 | |
| 1st inversion | F# G# B C# | C#7sus4/F# | |
| 2nd inversion | G# B C# F# | G#m11 (also read as C#7sus4/G#) | |
| 3rd inversion | B C# F# G# | C#7sus4/B |
Where C#7sus4 fits
C#7sus4 is V7sus4 in F# major. The usual move is C#7sus4 → C#7: the fourth, F#, falls a half step to the third E# while the seventh B stays. In modal jazz and gospel it is often left unresolved.