C13(#9) chord - C Dominant Thirteen Sharp Ninth - guitar chord chart
The C13(#9) chord, also read as C thirteenth sharp nine, is spelled C, E, G, Bb, D#, F and A: a root, a major third, a perfect fifth, a minor seventh, a sharp ninth, an eleventh and a thirteenth.
The sharp ninth D# sounds like Eb, so the chord carries a major third E and a minor third colour above the root at once. Try the C Half-Whole scale over it: built from alternating half and whole steps, it holds every chord tone except the eleventh F.
The chord is often heard in blues and funk. As a dominant it usually resolves to the chord a fourth above C, which is F.
C 13th with sharp 9th guitar chord is also written as C13(#9), C13#9 or C13+9.
C 13(#9) chord Notes:
Tones of the Dominant Thirteen Sharp Ninth chord:
Formula: 1 3 5 b7 #9 11 13
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Giancarlo is a musician (teaching guitar since 2000), software engineer, AI consultant and published researcher
FAQ
What are the notes of C13(#9)?
C13(#9) is spelled C, E, G, Bb, D#, F and A. It stacks a major third, perfect fifth, minor seventh, sharp ninth, eleventh and thirteenth on C.
Which scale suits C13(#9)?
The C half-whole scale spells C, Db, D#, E, F#, G, A and Bb. It covers every chord tone except the eleventh, F.
Why is the sharp ninth in C13(#9) written D#?
The ninth is counted as the letter D. The major ninth is D, so raising it by a half step gives D#, which sounds like Eb.
What do the intervals in C13(#9) mean?
They read 1, 3, 5, b7, #9, 11 and 13. In words: root, major third, perfect fifth, minor seventh, sharp ninth, perfect eleventh and major thirteenth.
