Half-diminished sevenths

>}Oh, if you're into the so-called "half-diminished" seventh chords (e.g.,
>}B D F A), one similar JI chord that has a wonderfully haunting sound is
>}5:6:7:9.
>
>Another wonderful tuning of the half-diminished seventh chord is the utonal
>tuning: 1/7:1/6:1/5:1/4. The fact that this chord sounds very different from
>5:6:7:9, and yet consonant (especially when played soflty on instruments rich
>in harmonic overtones) in its own way, is one of my favorite reasons for
>exploring non-12 tunings. 22tET, by the way, does a wonderful job of
>distinguishing these chords from each other.