A 30 tone well tempered nonet (30WTN) is related to well temperaments of 25edo and 26edo, but with a nonet rather than the 2/1 being constant. Its patent tunings optimally alternate division of the just perfect fifth into 15 equal parts (15EDF) with sequences of fifteen equal steps of 40 to 53.333 cents each. This will create fifteen equally-spaced intervals between an interval between 600 and 800 cents and the just perfect fifth.

Optimal Intervals

Target a Target b
1 46.797
2 93.594
3 140.391
4 187.188
5 233.985
6 280.782
7 327.579
8 374.376
9 421.173
10 467.97
11 514.767
12 561.564
13 608.361
14 655.158
15 701.955
16 751.7595 747.232
17 801.564 792.509
18 851.3685 837.7855
19 901.173 883.062
20 950.9775 928.339
21 1000.782 973.616
22 1050.6865 1018.938
23 1100.391 1064.1695
24 1150.1955 1109.446
25 1200 1154.723
26 1249.8045 1200
27 1299.609 1245.277
28 1349.4135 1290.554
29 1399.218 1335.8305
30 1449.0225 1381.107