Finger Positions

Root Note F#

Name F# minor double flat fifth over A#

Intervals 1P-3m-4P

Relative Minor A

Notes A#, F#, A, B

Aliases

How to play the F#mbb5/A# Chord

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

Common Progressions

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

I-V-vi-IV

F#m → C#m → D → Bm

vi-IV-I-V

D → Bm → F#m → C#m

The Diatonic Family

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

Triads

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

7ths

F#m7 G#m7b5 Amaj7 Bm7 C#m7 Dmaj7 E7

Scale Compatibility

View All Scales

* 0 scales found containing the notes A#, F#, A, B.

Acoustic & Digital Analysis

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

MIDI Numbers 70, 66, 69, 71

Frequencies (Hz)

466.1637615180899, 369.9944227116344, 440, 493.8833012561241