12WTN is the equal division of the just perfect fifth into six parts of 116.9925 cents each alternated with a sequence of six equal steps of another interval between 100 and 133.333 cents. Its best tunings are related to the miracle temperament, which tempers out 225/224 and 1029/1024 in the 7-limit.

Intervals

“fifth” 2 = 600¢ “nonet” = 1351.429¢ “nonet” = 1460¢ “fifth” 2 = 800¢
1 116.9925
2 233.985
3 350.9775
4 467.97
5 584.9625
6 701.955
7 801.955 810.201 828.296 835.328
8 901.955 918.446 954.637 968.662
9 1001.955 1026.692 1080.9775 1101.955
10 1101.955 1134.937 1207.318 1235.328
11 1201.955 1243.183 1333.695 1368.662
12 1301.955 1351.429 1460 1501.955

Common Tunings

fifth 2 = 6\11 fifth 2 = 3\5
1 116.9925
2 233.985
3 350.9775
4 467.97
5 584.9625
6 701.955
7 811.046 821.955
8 920.137 941.955
9 1029.228 1061.955
10 1138.319 1181.955
11 1247.4095 1301.955
12 1356.5005 1421.955
Fifths
1 694.053 704.9625
2 686.152 707.97
3 678.25 710.9775
4 670.349 713.985
5 662.4705 716.9925
6 654.5455 720
7 662.4705 716.9925
8 670.349 713.985
9 678.25 710.9775
10 686.152 707.97
11 694.053 704.9625
12 701.955