9:7

> I suppose I'd have to hear it in context, but a bare 9/7 sounds more like a
> car horn than a major third to me, a definitely spicy interval.

I generally regard it as a supramajor third, "supramajor" meaning that its
overall sonority is more like that of the quartertone between M3 and P4 than
that of either an M3 or a P4.