Finger Positions

Root Note F

Name F half-diminished over C#

Intervals 1P-3m-5d-7m

Relative Minor Dm

Notes C#, F, Ab, B, Eb

Aliases Fm7b5, Fø, F-7b5, Fh7, Fh

How to play the Fm7b5/C# Chord

The Fm7b5/C# is a fundamental dominant 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 half-diminished over C# is built using the 1P, 3m, 5d, 7m intervals. In the key of F Major, this chord functions as the I chord.

Common Progressions

In music composition, the Fm7b5/C# chord is often used to create tension or resolution.

I-V-vi-IV

F → C → Dm → Bb

vi-IV-I-V

Dm → Bb → F → C

The Diatonic Family

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

Triads

F Gm Am Bb C Dm Edim

7ths

Fmaj7 Gm7 Am7 Bbmaj7 C7 Dm7 Em7b5

Scale Compatibility

View All Scales

Minor Blues Locrian Locrian Pentatonic Super Locrian Pentatonic Altered Locrian #2 Locrian 6 Dorian #4 Hungarian Major Flamenco Bebop Locrian Half-Whole Diminished Composite Blues Messiaen's Mode #3 Chromatic

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

Acoustic & Digital Analysis

Digital footprint of the Fm7b5/C# chord for MIDI programming and synthesizer sound design.

MIDI Numbers 61, 65, 68, 71, 63

Frequencies (Hz)

277.1826309768721, 349.2282314330039, 415.3046975799451, 493.8833012561241, 311.1269837220809