Finger Positions

C#mbb5/F# diagram
Root Note C#
Name C# minor double flat fifth over F#
Intervals 1P-3m-4P
Relative Minor E
Notes C#, E, F#
Aliases

How to play the C#mbb5/F# Chord

The C#mbb5/F# is a fundamental minor 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# minor double flat fifth over F# is built using the 1P, 3m, 4P intervals. In the key of C# Major, this chord functions as the I chord.

Common Progressions

In music composition, the C#mbb5/F# chord is often used to create tension or resolution.

I-V-vi-IV

C#m → G#m → A → F#m

vi-IV-I-V

A → F#m → C#m → G#m

The Diatonic Family

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

Triads

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

7ths

C#m7 D#m7b5 Emaj7 F#m7 G#m7 Amaj7 B7

Scale Compatibility

View All Scales

* 0 scales found containing the notes C#, E, F#.

Acoustic & Digital Analysis

Digital footprint of the C#mbb5/F# chord for MIDI programming and synthesizer sound design.

MIDI Numbers 61, 64, 66
Frequencies (Hz)

277.1826309768721, 329.6275569128699, 369.9944227116344