<!doctype html public "-//w3c//dtd html 4.0 transitional//en"> <html> ric, <blockquote TYPE=CITE> <pre>What is 31 tET  ?</pre> </blockquote> 31-tone Equal Temperament, which is nearly equivalent to 1/4 Syntonic Comma Meantone. Christiann Huygens proposed this temperament in his Lettre touchant le cycle harmonique in 1691. Adriaan Fokker worked out a more microtonal notation system for 31tET which can be viewed and heard at <A HREF="http://www.xs4all.nl/~huygensf/indexeng.htm">http://www.xs4all.nl/~huygensf/indexeng.htm</A>   Clark</html>