C#m13 Minor 7th
The C#m13 chord is built from the notes C# – E – G# – B – D# – F# – A#.
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Also known as
C#mi15C#min13
Chord tones, one by one
C#Root
Root
The fundamental note the chord is built on — C#.
EThird
Minor third
Three semitones — makes the chord minor (darker, sadder).
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
Eleventh (11)
An 11th — a suspended, airy color on top of the chord.
A#Extension
Thirteenth (13)
A 13th — full, rich top extension.
🎼 Related scales
🎹 Modal analysis
This chord implies the Dorian scale; its characteristic note is the major 6th (13).
🎸 Genres
Modal jazz · Funk · Soul · Rock