Finger Positions

Root Note A

Name A eleventh over C#

Intervals 1P-5P-7m-9M-11P

Relative Minor F#m

Notes C#, A, E, G, B, D

Aliases A11

How to play the A11/C# Chord

The A11/C# is a fundamental dominant chord in guitar music. To play this chord correctly, ensure your fingers are placed precisely on the frets indicated in the diagram above.

Music Theory Analysis

From a theoretical perspective, the A eleventh over C# is built using the 1P, 5P, 7m, 9M, 11P intervals. In the key of A Major, this chord functions as the I chord.

Common Progressions

In music composition, the A11/C# chord is often used to create tension or resolution.

I-V-vi-IV

A → E → F#m → D

vi-IV-I-V

F#m → D → A → E

The Diatonic Family

Understanding the "family" of chords that belong to A helps with transposition and ear training.

Triads

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

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, E, G, B, D.

Acoustic & Digital Analysis

Digital footprint of the A11/C# chord for MIDI programming and synthesizer sound design.

MIDI Numbers 61, 69, 64, 67, 71, 62

Frequencies (Hz)

277.1826309768721, 440, 329.6275569128699, 391.99543598174927, 493.8833012561241, 293.6647679174076