Virginia Knight asks me:

>Are there any particular choirs you have in mind who sing like this? All
>the Priory recordings I've heard have been of all-male choirs.  ...

Good idea to get specific.  Chichester Cathedral - is that all male?
Christchurch Cathedral, New Zealand, is mixed, according to my prof, and
I really can't tell the difference between them and Chichester.

Then, of course, we have the Bulgarian throat singers, who sound like
nothing else on earth.

Steve Schwartz