Septidiasemi: Difference between revisions
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'''Septidiasemi''', in this article, is the rank-two regular temperament for the 2.3.5.7.13.17 subgroup defined by tempering out 2401/2400 and 2152828125/2147483648 in the 7-limit; 2205/2197 and 4096/4095 in the 13-limit; 833/832, 1275/1274, and 2025/2023 in the 17-limit. | {{todo|cleanup}} | ||
'''Septidiasemi''', in this article, is the [[Rank-2 temperament|rank-two regular temperament]] for the 2.3.5.7.13.17 [[subgroup]] defined by [[tempering out]] 2401/2400 and 2152828125/2147483648 in the 7-limit; 2205/2197 and 4096/4095 in the 13-limit; 833/832, 1275/1274, and 2025/2023 in the 17-limit. | |||
It can be seen as implying a rank-two tuning which is [[generator|generated]] by a large semitone of about 119.3 cents which represents [[15/14]] (septimal diatonic semitone) and from this it derives its name. Equal temperaments that support septidiasemi include [[10edo|10EDO]] (generator 1\10), [[151edo|151EDO]] (generator 15\151), [[161edo|161EDO]] (generator 16\161), and [[171edo|171EDO]] (generator 17\171). | It can be seen as implying a rank-two tuning which is [[generator|generated]] by a large semitone of about 119.3 cents which represents [[15/14]] (septimal diatonic semitone) and from this it derives its name. Equal temperaments that support septidiasemi include [[10edo|10EDO]] (generator 1\10), [[151edo|151EDO]] (generator 15\151), [[161edo|161EDO]] (generator 16\161), and [[171edo|171EDO]] (generator 17\171). | ||
| Line 6: | Line 7: | ||
== Intervals == | == Intervals == | ||
{| class="wikitable right- | {| class="wikitable right-all center-3" | ||
|- | |- | ||
! | ! Generator <br> steps | ||
! Cents<sup>*</sup> | ! Cents<sup>*</sup> | ||
! Approximate ratios<sup>†</sup> | ! Approximate <br> ratios<sup>†</sup> | ||
|- | |- | ||
| 0 | | 0 | ||
| Line 22: | Line 23: | ||
| 2 | | 2 | ||
| 238.593 | | 238.593 | ||
| | | 39/34 | ||
|- | |- | ||
| 3 | | 3 | ||
| Line 30: | Line 31: | ||
| 4 | | 4 | ||
| 477.186 | | 477.186 | ||
| | | 112/85, 120/91 | ||
|- | |- | ||
| 5 | | 5 | ||
| Line 38: | Line 39: | ||
| 6 | | 6 | ||
| 715.779 | | 715.779 | ||
| | | 68/45 | ||
|- | |- | ||
| 7 | | 7 | ||
| Line 54: | Line 55: | ||
| 10 | | 10 | ||
| 1192.965 | | 1192.965 | ||
| | | 448/225, 255/128, <br>544/273, 576/289 | ||
|- | |- | ||
| 11 | | 11 | ||
| Line 66: | Line 67: | ||
| 13 | | 13 | ||
| 350.855 | | 350.855 | ||
| | | 60/49, 49/40 | ||
|- | |- | ||
| 14 | | 14 | ||
| Line 78: | Line 79: | ||
| 16 | | 16 | ||
| 708.745 | | 708.745 | ||
| | | 128/85 | ||
|- | |- | ||
| 17 | | 17 | ||
| Line 90: | Line 91: | ||
| 19 | | 19 | ||
| 1066.634 | | 1066.634 | ||
| | | (close to 50/27) | ||
|- | |- | ||
| 20 | | 20 | ||
| 1185.931 | | 1185.931 | ||
| | | 119/60, 135/68 | ||
|- | |- | ||
| 21 | | 21 | ||
| Line 106: | Line 107: | ||
| 23 | | 23 | ||
| 343.820 | | 343.820 | ||
| | | 39/32 | ||
|- | |- | ||
| 24 | | 24 | ||
| Line 134: | Line 135: | ||
| 30 | | 30 | ||
| 1178.896 | | 1178.896 | ||
| | | (close to 160/81) | ||
|- | |- | ||
| 31 | | 31 | ||
| Line 158: | Line 159: | ||
| 36 | | 36 | ||
| 694.676 | | 694.676 | ||
| | | 112/75 | ||
|- | |- | ||
| 37 | | 37 | ||
| Line 174: | Line 175: | ||
| 40 | | 40 | ||
| 1171.862 | | 1171.862 | ||
| 63/32 | | 63/32, 128/65 | ||
|- | |- | ||
| 41 | | 41 | ||
| Line 254: | Line 255: | ||
| 60 | | 60 | ||
| 1157.793 | | 1157.793 | ||
| | | 39/20 | ||
|- | |- | ||
| 61 | | 61 | ||
| Line 338: | Line 339: | ||
| 81 | | 81 | ||
| 63.020 | | 63.020 | ||
| | | (close to 28/27) | ||
|- | |- | ||
| 82 | | 82 | ||
| Line 366: | Line 367: | ||
| 88 | | 88 | ||
| 898.096 | | 898.096 | ||
| | | 42/25 | ||
|- | |- | ||
| 89 | | 89 | ||
| 1017.392 | | 1017.392 | ||
| 9/5 | | 9/5 | ||
|- | |||
| 90 | |||
| 1136.689 | |||
| 27/14 | |||
|} | |} | ||
| Line 378: | Line 383: | ||
== See also == | == See also == | ||
* [[15/14]] - septimal diatonic semitone | * [[15/14]] - septimal diatonic semitone | ||
[[Category: | [[Category:Septidiasemi| ]] <!-- main article --> | ||
[[Category: | [[Category:Rank-2 temperaments]] | ||
[[Category:Breedsmic temperaments]] | |||