C9/A Guitar Chord

The C dominant ninth over A is a dominant chord. Explore fingerings, progressions, and theory analysis below.

Finger Positions

Dominant
C9/A diagram
Root Note C
Name C dominant ninth over A
Intervals 1P-3M-5P-7m-9M
Relative Minor Am
Notes A, C, E, G, Bb, D
Aliases C9

Common Progressions Popular patterns using C

I-V-vi-IV

C → G → Am → F

vi-IV-I-V

Am → F → C → G

Diatonic Family (Triads)

C Dm Em F G Am Bdim

Diatonic Family (7ths)

Cmaj7 Dm7 Em7 Fmaj7 G7 Am7 Bm7b5

Scale Compatibility

View All Scales
Bebop Mixolydian Mixolydian B6 Lydian Dominant Lydian Minor Bebop Minor Composite Blues Messiaen's Mode #3 Chromatic

* 9 scales found containing the notes A, C, E, G, Bb, D.

Audio & MIDI Analysis

MIDI Numbers 69, 60, 64, 67, 70, 62
Frequencies (Hz)

440, 261.6255653005986, 329.6275569128699, 391.99543598174927, 466.1637615180899, 293.6647679174076