Finger Positions

Root Note F#

Name F# suspended fourth over C#

Intervals 1P-4P-5P

Relative Minor D#m

Notes F#, B, C#

Aliases F#sus4, F#sus

How to play the F#sus4/C# Chord

The F#sus4/C# 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 F# suspended fourth over C# is built using the 1P, 4P, 5P intervals. In the key of F# Major, this chord functions as the I chord.

Common Progressions

In music composition, the F#sus4/C# chord is often used to create tension or resolution.

I-V-vi-IV

F# → C# → D#m → B

vi-IV-I-V

D#m → B → F# → C#

The Diatonic Family

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

Triads

F# G#m A#m B C# D#m Fdim

7ths

F#maj7 G#m7 A#m7 Bmaj7 C#7 D#m7 Fm7b5

Scale Compatibility

View All Scales

Major Minor Minor Blues Melodic Minor Harmonic Minor Bebop Dorian Mixolydian Phrygian Ionian Pentatonic Mixolydian Pentatonic Ritusen Egyptian Vietnamese 1 Kumoijoshi

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

Acoustic & Digital Analysis

Digital footprint of the F#sus4/C# chord for MIDI programming and synthesizer sound design.

MIDI Numbers 66, 71, 61

Frequencies (Hz)

369.9944227116344, 493.8833012561241, 277.1826309768721