Finger Positions

B5/A diagram
Root Note B
Name B fifth over A
Intervals 1P-5P
Relative Minor G#m
Notes A, B, F#
Aliases B5

How to play the B5/A Chord

The B5/A is a fundamental unknown 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 B fifth over A is built using the 1P, 5P intervals. In the key of B Major, this chord functions as the I chord.

Common Progressions

In music composition, the B5/A chord is often used to create tension or resolution.

I-V-vi-IV

B → F# → G#m → E

vi-IV-I-V

G#m → E → B → F#

The Diatonic Family

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

Triads

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

7ths

Bmaj7 C#m7 D#m7 Emaj7 F#7 G#m7 A#m7b5

Scale Compatibility

View All Scales
Major Pentatonic Major Minor Major Blues Minor Blues Melodic Minor Harmonic Minor Bebop Dorian Lydian Mixolydian Phrygian Ionian Pentatonic Mixolydian Pentatonic Ritusen

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

Acoustic & Digital Analysis

Digital footprint of the B5/A chord for MIDI programming and synthesizer sound design.

MIDI Numbers 69, 71, 66
Frequencies (Hz)

440, 493.8833012561241, 369.9944227116344