Finger Positions

Root Note C

Name C suspended second sharp fifth over A#

Intervals 1P-2M-5A

Relative Minor Am

Notes A#, C, D, G#

Aliases

How to play the Csus2#5/A# Chord

The Csus2#5/A# is a fundamental suspended 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 C suspended second sharp fifth over A# is built using the 1P, 2M, 5A intervals. In the key of C Major, this chord functions as the I chord.

Common Progressions

In music composition, the Csus2#5/A# chord is often used to create tension or resolution.

I-V-vi-IV

C → G → Am → F

vi-IV-I-V

Am → F → C → G

The Diatonic Family

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

Triads

C Dm Em F G Am Bdim

7ths

Cmaj7 Dm7 Em7 Fmaj7 G7 Am7 Bm7b5

Scale Compatibility

View All Scales

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

Acoustic & Digital Analysis

Digital footprint of the Csus2#5/A# chord for MIDI programming and synthesizer sound design.

MIDI Numbers 70, 60, 62, 68

Frequencies (Hz)

466.1637615180899, 261.6255653005986, 293.6647679174076, 415.3046975799451