C#13#11 Dominant 7th
The C#13#11 chord is built from the notes C# – E# – G# – B – D# – F## – A#.
Piano sound loads on first tap.
Also known as
C#13(#11)C#13add#11
Chord tones, one by one
C#Root
Root
The fundamental note the chord is built on — C#.
E#Third
Major third
Four semitones — makes the chord major (brighter, happier).
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.
F##Extension
Sharp eleventh (♯11)
A ♯11 — the bright, floating Lydian color.
A#Extension
Thirteenth (13)
A 13th — full, rich top extension.
🎼 Related scales
Lydian dominant (acoustic)melodic minor a perfect 4th below
🎹 Modal analysis
This chord implies the Lydian dominant (acoustic) scale; its characteristic note is the ♯11 over a ♭7 (the acoustic sound). It is a mode of the melodic minor a perfect 4th below.
🎸 Genres
Jazz fusion · Modal jazz · Bossa/MPB