43edt: Difference between revisions
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'''[[Edt|Division of the third harmonic]] into 43 equal parts''' (43EDT) is related to [[27edo|27 EDO]], but with the 3/1 rather than the 2/1 being just. The octave is about 5.7492 cents compressed and the step size is about 44.2315 cents. It is consistent to the [[9-odd-limit|10-integer-limit]]. | |||
=43 EDT= | =43 EDT= | ||
This tuning is related to | This tuning is related to 27EDO having ~5.7 cent octave compression, 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 | 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|13EDT]] is not. The 4L+5s MOS has L=7 s=3. | ||
{| class="wikitable" | {| class="wikitable" | ||
|- | |- | ||
! | | ! | degrees | ||
! | | ! | cents value | ||
! | corresponding <br>JI intervals | |||
|- | |- | ||
| | 1 | | | 1 | ||
| | 44.232 | | | 44.232 | ||
| | 40/39, 39/38 | |||
|- | |- | ||
| | 2 | | | 2 | ||
| | 88.463 | | | 88.463 | ||
| | [[20/19]] | |||
|- | |- | ||
| | 3 | | | 3 | ||
| | 132.695 | | | 132.695 | ||
| | [[27/25]] | |||
|- | |- | ||
| | 4 | | | 4 | ||
| | 176.926 | | | 176.926 | ||
| | | |||
|- | |- | ||
| | 5 | | | 5 | ||
| | 221.158 | | | 221.158 | ||
| | [[25/22]] | |||
|- | |- | ||
| | 6 | | | 6 | ||
| | 265.389 | | | 265.389 | ||
| | ([[7/6]]) | |||
|- | |- | ||
| | 7 | | | 7 | ||
| | 309.621 | | | 309.621 | ||
| | | |||
|- | |- | ||
| | 8 | | | 8 | ||
| | 353.852 | | | 353.852 | ||
| | [[27/22]] | |||
|- | |- | ||
| | 9 | | | 9 | ||
| | 398.084 | | | 398.084 | ||
| | | |||
|- | |- | ||
| | 10 | | | 10 | ||
| | 442.315 | | | 442.315 | ||
| | | |||
|- | |- | ||
| | 11 | | | 11 | ||
| | 486.547 | | | 486.547 | ||
| | (45/34) | |||
|- | |- | ||
| | 12 | | | 12 | ||
| | 530.778 | | | 530.778 | ||
| | (34/25) | |||
|- | |- | ||
| | 13 | | | 13 | ||
| | 575.010 | | | 575.010 | ||
| | (39/28) | |||
|- | |- | ||
| | 14 | | | 14 | ||
| | 619.241 | | | 619.241 | ||
| | ([[10/7]]) | |||
|- | |- | ||
| | 15 | | | 15 | ||
| | 663.473 | | | 663.473 | ||
| | [[22/15]] | |||
|- | |- | ||
| | 16 | | | 16 | ||
| | 707.704 | | | 707.704 | ||
| | | |||
|- | |- | ||
| | 17 | | | 17 | ||
| | 751.936 | | | 751.936 | ||
| | | |||
|- | |- | ||
| | 18 | | | 18 | ||
| | 796.167 | | | 796.167 | ||
| | [[19/12]] | |||
|- | |- | ||
| | 19 | | | 19 | ||
| | 840.399 | | | 840.399 | ||
| | [[13/8]] | |||
|- | |- | ||
| | 20 | | | 20 | ||
| | 884.630 | | | 884.630 | ||
| | [[5/3]] | |||
|- | |- | ||
| | 21 | | | 21 | ||
| | 928.862 | | | 928.862 | ||
| | | |||
|- | |- | ||
| | 22 | | | 22 | ||
| | 973.093 | | | 973.093 | ||
| | | |||
|- | |- | ||
| | 23 | | | 23 | ||
| | 1017.325 | | | 1017.325 | ||
| | [[9/5]] | |||
|- | |- | ||
| | 24 | | | 24 | ||
| | 1061.556 | | | 1061.556 | ||
| | [[24/13]] | |||
|- | |- | ||
| | 25 | | | 25 | ||
| | 1105.788 | | | 1105.788 | ||
| | [[36/19]] | |||
|- | |- | ||
| | 26 | | | 26 | ||
| | 1150.019 | | | 1150.019 | ||
| | 68/35 | |||
|- | |- | ||
| | 27 | | | 27 | ||
| | 1194.251 | | | 1194.251 | ||
| | | |||
|- | |- | ||
| | 28 | | | 28 | ||
| | 1238.482 | | | 1238.482 | ||
| | [[45/44|45/22]] | |||
|- | |- | ||
| | 29 | | | 29 | ||
| | 1282.713 | | | 1282.713 | ||
| | ([[21/20|21/10]]) | |||
|- | |- | ||
| | 30 | | | 30 | ||
| | 1326.946 | | | 1326.946 | ||
| | ([[14/13|28/13]]) | |||
|- | |- | ||
| | 31 | | | 31 | ||
| | 1371.177 | | | 1371.177 | ||
| | | |||
|- | |- | ||
| | 32 | | | 32 | ||
| | 1415.408 | | | 1415.408 | ||
| | ([[17/15|34/15]]) | |||
|- | |- | ||
| | 33 | | | 33 | ||
| | 1459.640 | | | 1459.640 | ||
| | | |||
|- | |- | ||
| | 34 | | | 34 | ||
| | 1503.871 | | | 1503.871 | ||
| | | |||
|- | |- | ||
| | 35 | | | 35 | ||
| | 1548.193 | | | 1548.193 | ||
| | [[11/9|22/9]] | |||
|- | |- | ||
| | 36 | | | 36 | ||
| | 1592.334 | | | 1592.334 | ||
| | | |||
|- | |- | ||
| | 37 | | | 37 | ||
| | 1636.566 | | | 1636.566 | ||
| | ([[9/7|18/7]]) | |||
|- | |- | ||
| | 38 | | | 38 | ||
| | 1680.797 | | | 1680.797 | ||
| | [[33/25|66/25]] | |||
|- | |- | ||
| | 39 | | | 39 | ||
| | 1725.029 | | | 1725.029 | ||
| | | |||
|- | |- | ||
| | 40 | | | 40 | ||
| | 1769.261 | | | 1769.261 | ||
| | [[25/9]] | |||
|- | |- | ||
| | 41 | | | 41 | ||
| | 1813.492 | | | 1813.492 | ||
| | 57/20 | |||
|- | |- | ||
| | 42 | | | 42 | ||
| | 1857.724 | | | 1857.724 | ||
| | [[19/13|38/13]] | |||
|- | |- | ||
| | 43 | | | 43 | ||
| | 1901.955 | | | 1901.955 | ||
| | '''exact [[3/1]]''' | |||
|} | |} | ||
[[Category: | [[Category:Edt]] | ||
[[Category: | [[Category:Edonoi]] | ||