C#7sus4(b9)(add3) Suspended
The C#7sus4(b9)(add3) chord is built from the notes C# – F# – G# – B – D – F.
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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).
DExtension
Flat ninth (♭9)
A ♭9 — sharp, dissonant tension typical of altered dominant chords.
FExtension
Extension (16 st)
An upper extension 16 semitones above the root.
🎼 Related scales
Phrygian dominantharmonic minor a perfect 5th below
🎹 Modal analysis
This chord implies the Phrygian dominant scale; its characteristic note is the ♭9 / ♭2. It is a mode of the harmonic minor a perfect 5th below.
🎸 Genres
Flamenco · Middle-Eastern · Klezmer · Neoclassical metal