The C♯ 7sus4 chord is a four-note chord made up of C♯, F♯, G♯, and B. It is built from a root, perfect fourth, perfect fifth, and minor seventh.
Construction
C♯ 7sus4 = Root + Perfect 4th + Perfect 5th + Minor 7th = C♯ · F♯ · G♯ · B
| Note | Interval | Degree |
|---|---|---|
| C♯ | Root | 1 |
| F♯ | Perfect 4th | 11 |
| G♯ | Perfect 5th | 5 |
| B | Minor 7th | ♭7 |
C♯ 7sus4 Inversions
| Position | Notes |
|---|---|
| Root Position | C♯ – F♯ – G♯ – B |
| 1st Inversion | F♯ – G♯ – B – C♯ |
| 2nd Inversion | G♯ – B – C♯ – F♯ |
| 3rd Inversion | B – C♯ – F♯ – G♯ |
Key Signature
A chord has no key signature of its own, but the C♯ 7sus4 is the tonic (I) chord of C# Major, whose key signature has 7 sharps (F♯, C♯, G♯, D♯, A♯, E♯, B♯).
F♯C♯G♯D♯A♯E♯B♯
Order of sharps
Sharps are added to a key signature in a fixed order. Each new sharp key adds the next sharp on the list.
F♯C♯G♯D♯A♯E♯B♯
Mnemonic: Father Charles Goes Down And Ends Battle
Chords in the Key of C♯ Major
These are the triads built on each degree of the C♯ major scale:
C♯ 7sus4 — Frequently Asked Questions
What is the C♯ 7sus4 chord on piano?
The C♯ 7sus4 chord contains the notes C♯ – F♯ – G♯ – B. On piano, play these notes together to sound the chord.
What notes are in the C# 7sus4 chord?
The C# 7sus4 chord (C#7sus4) contains 4 notes: C#, F#, G#, B. Formula: R-P4-P5-m7.
How is C#7sus4 used in music?
C#7sus4 is used in jazz, fusion, and contemporary music to add harmonic color. It appears as a dominant or tonic chord depending on context.
What is the scale degree formula for C#7sus4?
C#7sus4 uses scale degrees 1-4-5-b7, giving it its distinctive sound.