C#mmaj13 Minor-Major 7th
The C#mmaj13 chord is built from the notes C# – E – G# – B# – D# – D# – A#.
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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.
B#Seventh
Major seventh
Eleven semitones — a lush, jazzy seventh just below the octave (maj7).
D#Extension
Ninth (9)
A 9th — colorful extension a whole step above the octave.
D#Extension
Ninth (9)
A 9th — colorful extension a whole step above the octave.
A#Extension
Thirteenth (13)
A 13th — full, rich top extension.
🎼 Related scales
🎹 Modal analysis
This chord implies the Melodic minor scale; its characteristic note is the major 7th.
🎸 Genres
Modern jazz · Post-bop · Fusion