Bdim7/A Guitar Chord

The B diminished seventh over A is a dominant chord. Explore fingerings, progressions, and theory analysis below.

Finger Positions

Dominant
Bdim7/A diagram
Root Note B
Name B diminished seventh over A
Intervals 1P-3m-5d-7d
Relative Minor G#m
Notes A, B, D, F, Ab
Aliases Bdim7, B°7, Bo7

Common Progressions Popular patterns using B

I-V-vi-IV

B → F# → G#m → E

vi-IV-I-V

G#m → E → B → F#

Diatonic Family (Triads)

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

Diatonic Family (7ths)

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

Scale Compatibility

View All Scales
Diminished Ultralocrian Locrian 6 Dorian #4 Lydian Diminished Hungarian Major Lydian #9 Half-Whole Diminished Composite Blues Messiaen's Mode #7 Chromatic

* 11 scales found containing the notes A, B, D, F, Ab.

Audio & MIDI Analysis

MIDI Numbers 69, 71, 62, 65, 68
Frequencies (Hz)

440, 493.8833012561241, 293.6647679174076, 349.2282314330039, 415.3046975799451