C#9sus4 Suspended
The C#9sus4 chord is built from the notes C# – F# – G# – B – D#.
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Also known as
C#9susC#m9susC#min9sus4
Chord tones, one by one
C#Root
Root
The fundamental note the chord is built on — C#.
F#Third
Suspended 4th
A perfect 4th replaces the third — tense, wants to resolve (sus4).
G#Fifth
Perfect fifth
Seven semitones — the most stable interval, reinforces the root.
BSeventh
Minor seventh (♭7)
Ten semitones — the dominant/minor seventh. Adds bluesy tension (7, m7).
D#Extension
Ninth (9)
A 9th — colorful extension a whole step above the octave.
🎼 Related scales
🎹 Modal analysis
This chord implies the Mixolydian scale; its characteristic note is the minor 7th (♭7).
🎸 Genres
Blues · Rock · Funk · Gospel