C#/A Guitar Chord

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

Finger Positions

Major
C#/A diagram
Root Note C#
Name C# major over A
Intervals 1P-3M-5P
Relative Minor A#m
Notes A, C#, F, G#
Aliases C#M, C#^, C#, C#maj

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
Major Pentatonic Major Major Blues Bebop Lydian Mixolydian Ionian Pentatonic Mixolydian Pentatonic Lydian Pentatonic Flat Six Pentatonic Scriabin Lydian Dominant Pentatonic Augmented Double Harmonic Lydian Mixolydian B6

* 15 scales found containing the notes A, C#, F, G#.

Audio & MIDI Analysis

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

440, 277.1826309768721, 349.2282314330039, 415.3046975799451