Finger Positions

Root Note A

Name A majflat fifth over C#

Intervals 1P-3M-5d

Relative Minor F#m

Notes A, C#, Eb

Aliases

How to play the Amajb5/C# Chord

The Amajb5/C# is a fundamental major 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 majflat fifth over C# is built using the 1P, 3M, 5d intervals. In the key of A Major, this chord functions as the I chord.

Common Progressions

In music composition, the Amajb5/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

* 0 scales found containing the notes A, C#, Eb.

Acoustic & Digital Analysis

Digital footprint of the Amajb5/C# chord for MIDI programming and synthesizer sound design.

MIDI Numbers 69, 61, 63

Frequencies (Hz)

440, 277.1826309768721, 311.1269837220809