Playing, Part 2 · Chapter 12: More Chords and Inversions
Minor Seventh (With Flatted Fifth) Chords and Inversions
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If we flat the 5th of the minor 7th chord, we get another useful chord, which is called… you guessed it… a minor 7♭5 chord:

Note the new diminished 5th interval description on the previous page. When we take a perfect interval (such as a 5th) and reduce it by a half step, we get a diminished interval.
The “minor 7th ♭5” chord is also referred to as a half diminished or half diminished 7th chord.
We can invert the C minor 7th ♭5 chord, as follows:
