10.34The symbol trap: B° versus B°7

Remember:

B°

usually = diminished triad:

B D F

B°7

= fully diminished seventh:

B D F A♭

And:

Bø7

= half-diminished seventh:

B D F A

These are three different chords.

Visually:

°

versus:

°7

versus:

ø7

Make sure those symbols become familiar.