B°7
Sevenths · B root
B°7
Maximum tension. Fully symmetric — every inversion sounds similar.
0 st3 st6 st9 st
Notes in B°7
BRoot
D3rd
F5th
G#7th
B is less common as a home key but appears often as the III or VII chord in various progressions.
Identify the Chord Quality on B
Each chord below is played on B. Listen and identify whether you heard B°7, Bm, B7, or another quality — the hardest and most useful ear training skill.
Diminished 7th in All 12 Keys
Other Chords in B
Related Sevenths
About the B°7 Chord
The B°7 chord is a diminished 7th chord built on B. It contains the notes B, D, F, G# — the root, third, fifth, and seventh.
Maximum tension. Fully symmetric — every inversion sounds similar. Practising the B°7 chord across different voicings and contexts builds the harmonic recognition that lets you identify it instantly in any musical setting — whether in a band mix, a recording, or a live performance.