A7#9b5/C Guitar Chord

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

Finger Positions

Dominant
A7#9b5/C diagram
Root Note A
Name A over C
Intervals 1P-3M-5P-7m-9A-11A
Relative Minor F#m
Notes A, C#, E, G, C, D#
Aliases A7#9#11, A7b5#9, A7#9b5

Common Progressions Popular patterns using A

I-V-vi-IV

A → E → F#m → D

vi-IV-I-V

F#m → D → A → E

Diatonic Family (Triads)

A Bm C#m D E F#m G#dim

Diatonic Family (7ths)

Amaj7 Bm7 C#m7 Dmaj7 E7 F#m7 G#m7b5

Scale Compatibility

View All Scales
Hungarian Major Flamenco Half-Whole Diminished Composite Blues Messiaen's Mode #3 Chromatic

* 6 scales found containing the notes A, C#, E, G, C, D#.

Audio & MIDI Analysis

MIDI Numbers 69, 61, 64, 67, 60, 63
Frequencies (Hz)

440, 277.1826309768721, 329.6275569128699, 391.99543598174927, 261.6255653005986, 311.1269837220809