43edt

43 EDT

This tuning is related to 27edo having compressed octaves of 1194.251 cents, a small but significant deviation. This is particularly relevant because 27edo is a "sharp tending" system, and flattening its octaves has been suggested before as an improvement (I think by no less than Ivor Darreg, but I'll have to check that).

However, in addition to its rich octave-based harmony, the 43edt is also a fine tritave-based tuning: with a 7/3 of 1460 cents and such a near perfect 5/3, Bohlen-Pierce harmony is very clear and hearty, as well as capable of extended enharmonic distinctions that 13edt is not. The 4L+5s MOS has L=7 s=3.

Degrees	Cents
1	44.232
2	88.463
3	132.695
4	176.926
5	221.158
6	265.389
7	309.621
8	353.852
9	398.084
10	442.315
11	486.547
12	530.778
13	575.010
14	619.241
15	663.473
16	707.704
17	751.936
18	796.167
19	840.399
20	884.630
21	928.862
22	973.093
23	1017.325
24	1061.556
25	1105.788
26	1150.019
27	1194.251
28	1238.482
29	1282.713
30	1326.946
31	1371.177
32	1415.408
33	1459.640
34	1503.871
35	1548.193
36	1592.334
37	1636.566
38	1680.797
39	1725.029
40	1769.261
41	1813.492
42	1857.724
43	1901.955