A9sus4/C# Guitar Chord

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

Finger Positions

Dominant
A9sus4/C# diagram
Root Note A
Name A over C#
Intervals 1P-4P-5P-7m-9M
Relative Minor F#m
Notes C#, A, D, E, G, B
Aliases A9sus4, A9sus

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
Minor Bebop Dorian Mixolydian Piongio Mixolydian B6 Bebop Minor Minor Bebop Composite Blues Chromatic

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

Audio & MIDI Analysis

MIDI Numbers 61, 69, 62, 64, 67, 71
Frequencies (Hz)

277.1826309768721, 440, 293.6647679174076, 329.6275569128699, 391.99543598174927, 493.8833012561241