Question: what is the difference between half diminished and fully diminished?
Answer: A half diminished seventh is denoted with a ø and it is also common to see a ø7 because it is a seventh chord but a half diminished chord will always have a seventh. ... A fully diminished seventh is denoted with a °7, i.e. C°7. They contain a root, a minor third, a diminished fifth, and a diminished seventh.