C#9/A Guitar Chord

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

Finger Positions

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

Common Progressions Popular patterns using C#

I-V-vi-IV

C# → G# → A#m → F#

vi-IV-I-V

A#m → F# → C# → G#

Diatonic Family (Triads)

C# D#m Fm F# G# A#m Cdim

Diatonic Family (7ths)

C#maj7 D#m7 Fm7 F#maj7 G#7 A#m7 Cm7b5

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#, F, G#, B, D#.

Audio & MIDI Analysis

MIDI Numbers 69, 61, 65, 68, 71, 63
Frequencies (Hz)

440, 277.1826309768721, 349.2282314330039, 415.3046975799451, 493.8833012561241, 311.1269837220809