Georgian Music Collection.

http://en.music.inet.ge/

Supposed to be the oldest polyphonic music tradition in the world
even outdating Christianity. The microtonal scale described in Wikipedia
might be approximated as

0-180-360-520-700-860-1040-1220 cents which can be obtained by
stacking 860 cents (this is speculation on my part).

robert thomas martin wrote:
> http://en.music.inet.ge/
>
> Supposed to be the oldest polyphonic music tradition in the world
> even outdating Christianity. The microtonal scale described in Wikipedia
> might be approximated as
>
> 0-180-360-520-700-860-1040-1220 cents which can be obtained by
> stacking 860 cents (this is speculation on my part).

I've heard a little Georgian polyphonic choral music, but not enough, sadly. I do remember neutral-sounding thirds and sevenths, like you would in the Rast maqam. The Wikipedia article you mention:

http://en.wikipedia.org/wiki/Music_of_Georgia

says:

"Between the unison and the fifth, however, come three evenly-spaced notes, producing a compressed (compared to most European music) major second, a neutral third, and a stretched perfect fourth. Likewise, between the fifth and the octave come two evenly-spaced notes, producing a compressed major sixth and a stretched minor seventh. This system of tuning renders thirds as the most consonant interval after fifths, which resulted in the third being treated as a stable interval in Georgia long before it acquired that status in Western music."

Four equal divisions of a fifth produces, in cents: 175.5 351 525.5 702. Three equal divisions of a fourth on top of that would be 702 868 1034 1200. A JI approximation could be: 1/1 21/19 11/9 19/14 3/2 33/20 20/11 2/1 (or in way-too-simple ratios: 1/1 10/9 11/9 4/3 3/2 5/3 9/5 2/1).

But this is speculation on my part too, and possibly the author(s) of the Wikipedia article as well. There has to be pretty wide variation of tuning; the Muslim minority of the country likely has some historical Ottoman Turkish influence.

So we'll have a "Georgian" (or "Kartveli") temperament coming soon? ~D.