Pythagorean family: Difference between revisions
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Wikispaces>genewardsmith **Imported revision 188879167 - Original comment: ** |
Wikispaces>genewardsmith **Imported revision 188879885 - Original comment: ** |
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<h2>IMPORTED REVISION FROM WIKISPACES</h2> | <h2>IMPORTED REVISION FROM WIKISPACES</h2> | ||
This is an imported revision from Wikispaces. The revision metadata is included below for reference:<br> | This is an imported revision from Wikispaces. The revision metadata is included below for reference:<br> | ||
: This revision was by author [[User:genewardsmith|genewardsmith]] and made on <tt>2010-12-17 03: | : This revision was by author [[User:genewardsmith|genewardsmith]] and made on <tt>2010-12-17 03:55:50 UTC</tt>.<br> | ||
: The original revision id was <tt> | : The original revision id was <tt>188879885</tt>.<br> | ||
: The revision comment was: <tt></tt><br> | : The revision comment was: <tt></tt><br> | ||
The revision contents are below, presented both in the original Wikispaces Wikitext format, and in HTML exactly as Wikispaces rendered it.<br> | The revision contents are below, presented both in the original Wikispaces Wikitext format, and in HTML exactly as Wikispaces rendered it.<br> | ||
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<div style="width:100%; max-height:400pt; overflow:auto; background-color:#f8f9fa; border: 1px solid #eaecf0; padding:0em"><pre style="margin:0px;border:none;background:none;word-wrap:break-word;white-space: pre-wrap ! important" class="old-revision-html">The Pythagorean family tempers out the Pythagorean comma, 531441/524288 = |-19 12>, and hence the fifths form a closed 12-note circle of fifths, identical to [[12edo]]. While the tuning of the fifth will be that of 12et, two cents flat, the tuning of the larger primes is not so constrained, and the point of these temperaments is to improve on it. | <div style="width:100%; max-height:400pt; overflow:auto; background-color:#f8f9fa; border: 1px solid #eaecf0; padding:0em"><pre style="margin:0px;border:none;background:none;word-wrap:break-word;white-space: pre-wrap ! important" class="old-revision-html">The Pythagorean family tempers out the Pythagorean comma, 531441/524288 = |-19 12>, and hence the fifths form a closed 12-note circle of fifths, identical to [[12edo]]. While the tuning of the fifth will be that of 12et, two cents flat, the tuning of the larger primes is not so constrained, and the point of these temperaments is to improve on it. | ||
[[POTE tuning|POTE generator]]: | [[POTE tuning|POTE generator]]: 15.116 | ||
Map: [<12 19 0|, <0 0 1|] | Map: [<12 19 0|, <0 0 1|] | ||
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Commas: 225/224, 250047/250000 | Commas: 225/224, 250047/250000 | ||
[[POTE tuning|POTE generator]]: | [[POTE tuning|POTE generator]]: 16.225 | ||
Map: [<12 19 0 -22|, <0 0 1 2|] | Map: [<12 19 0 -22|, <0 0 1 2|] | ||
| Line 30: | Line 30: | ||
Commas: 225/224, 441/440, 4375/4356 | Commas: 225/224, 441/440, 4375/4356 | ||
[[POTE tuning|POTE generator]]: | [[POTE tuning|POTE generator]]: 16.734 | ||
Map: [<12 19 0 -22 -42|, <0 0 1 2 3|] | Map: [<12 19 0 -22 -42|, <0 0 1 2 3|] | ||
| Line 40: | Line 40: | ||
Commas: 81/80, 128/125 | Commas: 81/80, 128/125 | ||
[[POTE tuning|POTE generator]]: | [[POTE tuning|POTE generator]]: 26.790 | ||
Map: [<12 19 28 0|, <0 0 0 1|] | Map: [<12 19 28 0|, <0 0 0 1|] | ||
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<div style="width:100%; max-height:400pt; overflow:auto; background-color:#f8f9fa; border: 1px solid #eaecf0; padding:0em"><pre style="margin:0px;border:none;background:none;word-wrap:break-word;width:200%;white-space: pre-wrap ! important" class="old-revision-html"><html><head><title>Pythagorean family</title></head><body>The Pythagorean family tempers out the Pythagorean comma, 531441/524288 = |-19 12&gt;, and hence the fifths form a closed 12-note circle of fifths, identical to <a class="wiki_link" href="/12edo">12edo</a>. While the tuning of the fifth will be that of 12et, two cents flat, the tuning of the larger primes is not so constrained, and the point of these temperaments is to improve on it.<br /> | <div style="width:100%; max-height:400pt; overflow:auto; background-color:#f8f9fa; border: 1px solid #eaecf0; padding:0em"><pre style="margin:0px;border:none;background:none;word-wrap:break-word;width:200%;white-space: pre-wrap ! important" class="old-revision-html"><html><head><title>Pythagorean family</title></head><body>The Pythagorean family tempers out the Pythagorean comma, 531441/524288 = |-19 12&gt;, and hence the fifths form a closed 12-note circle of fifths, identical to <a class="wiki_link" href="/12edo">12edo</a>. While the tuning of the fifth will be that of 12et, two cents flat, the tuning of the larger primes is not so constrained, and the point of these temperaments is to improve on it.<br /> | ||
<br /> | <br /> | ||
<a class="wiki_link" href="/POTE%20tuning">POTE generator</a>: | <a class="wiki_link" href="/POTE%20tuning">POTE generator</a>: 15.116<br /> | ||
<br /> | <br /> | ||
Map: [&lt;12 19 0|, &lt;0 0 1|]<br /> | Map: [&lt;12 19 0|, &lt;0 0 1|]<br /> | ||
| Line 61: | Line 61: | ||
Commas: 225/224, 250047/250000<br /> | Commas: 225/224, 250047/250000<br /> | ||
<br /> | <br /> | ||
<a class="wiki_link" href="/POTE%20tuning">POTE generator</a>: | <a class="wiki_link" href="/POTE%20tuning">POTE generator</a>: 16.225<br /> | ||
<br /> | <br /> | ||
Map: [&lt;12 19 0 -22|, &lt;0 0 1 2|]<br /> | Map: [&lt;12 19 0 -22|, &lt;0 0 1 2|]<br /> | ||
| Line 69: | Line 69: | ||
Commas: 225/224, 441/440, 4375/4356<br /> | Commas: 225/224, 441/440, 4375/4356<br /> | ||
<br /> | <br /> | ||
<a class="wiki_link" href="/POTE%20tuning">POTE generator</a>: | <a class="wiki_link" href="/POTE%20tuning">POTE generator</a>: 16.734<br /> | ||
<br /> | <br /> | ||
Map: [&lt;12 19 0 -22 -42|, &lt;0 0 1 2 3|]<br /> | Map: [&lt;12 19 0 -22 -42|, &lt;0 0 1 2 3|]<br /> | ||
| Line 79: | Line 79: | ||
Commas: 81/80, 128/125<br /> | Commas: 81/80, 128/125<br /> | ||
<br /> | <br /> | ||
<a class="wiki_link" href="/POTE%20tuning">POTE generator</a>: | <a class="wiki_link" href="/POTE%20tuning">POTE generator</a>: 26.790<br /> | ||
<br /> | <br /> | ||
Map: [&lt;12 19 28 0|, &lt;0 0 0 1|]<br /> | Map: [&lt;12 19 28 0|, &lt;0 0 0 1|]<br /> | ||
EDOs: 12, 36, 48, 132, 180</body></html></pre></div> | EDOs: 12, 36, 48, 132, 180</body></html></pre></div> | ||
Revision as of 03:55, 17 December 2010
IMPORTED REVISION FROM WIKISPACES
This is an imported revision from Wikispaces. The revision metadata is included below for reference:
- This revision was by author genewardsmith and made on 2010-12-17 03:55:50 UTC.
- The original revision id was 188879885.
- The revision comment was:
The revision contents are below, presented both in the original Wikispaces Wikitext format, and in HTML exactly as Wikispaces rendered it.
Original Wikitext content:
The Pythagorean family tempers out the Pythagorean comma, 531441/524288 = |-19 12>, and hence the fifths form a closed 12-note circle of fifths, identical to [[12edo]]. While the tuning of the fifth will be that of 12et, two cents flat, the tuning of the larger primes is not so constrained, and the point of these temperaments is to improve on it. [[POTE tuning|POTE generator]]: 15.116 Map: [<12 19 0|, <0 0 1|] EDOs: 12, 72, 84, 156, 240, 396 ===Compton temperament=== In terms of the normal list, compton adds 413343/409600 = |-14 10 -2 1> to the Pythagorean comma; however it can also be characterized by saying it adds 225/224. Compton, however, does not need to be used as a 7-limit temperament; in the 5-limit it becomes the rank two 5-limit temperament tempering out the Pythagorean comma. In terms of equal temperaments, it is the 12&72 temperament, and [[72edo]], [[84edo]] or [[240edo]] make for good tunings. Possible generators are 21/20, 10/9, the secor, 6/5, 5/4, 7/5 and most importantly, 81/80. In the either the 5 or 7-limit, [[240edo]] is an excellent tuning, with 81/80 coming in at 15 cents exactly. The major third is sharp by 13.686 cents, and the minor third flat by 15.641 cents; adjusting these down and up by 15 cents puts them in excellent tune. In terms of the normal comma list, we may add 8019/8000 to get to the 11-limit version of compton, which also adds 441/440. For this [[72edo]] can be recommended as a tuning. Commas: 225/224, 250047/250000 [[POTE tuning|POTE generator]]: 16.225 Map: [<12 19 0 -22|, <0 0 1 2|] EDOs: 12, 60, 72, 228, 444 11-limit Commas: 225/224, 441/440, 4375/4356 [[POTE tuning|POTE generator]]: 16.734 Map: [<12 19 0 -22 -42|, <0 0 1 2 3|] EDOs: 12, 60, 72, 2940 ===Catler temperament=== In terms of the normal comma list, catler is characterized by the addition of the schisma, 32805/32768, to the Pythagorean comma, though it can also be characterized as adding 81/80, 128/125 or 648/625. In any event, the 5-limit is exactly the same as the 5-limit of [[12edo]]. Catler can also be characterized as the 12&24 temperament. [[36edo]] or [[48edo]] are possible tunings, and 36/35, 21/20, 15/14, 8/7, 7/6, 6/5, 9/7 or 7/5 are possible generators. Commas: 81/80, 128/125 [[POTE tuning|POTE generator]]: 26.790 Map: [<12 19 28 0|, <0 0 0 1|] EDOs: 12, 36, 48, 132, 180
Original HTML content:
<html><head><title>Pythagorean family</title></head><body>The Pythagorean family tempers out the Pythagorean comma, 531441/524288 = |-19 12>, and hence the fifths form a closed 12-note circle of fifths, identical to <a class="wiki_link" href="/12edo">12edo</a>. While the tuning of the fifth will be that of 12et, two cents flat, the tuning of the larger primes is not so constrained, and the point of these temperaments is to improve on it.<br /> <br /> <a class="wiki_link" href="/POTE%20tuning">POTE generator</a>: 15.116<br /> <br /> Map: [<12 19 0|, <0 0 1|]<br /> EDOs: 12, 72, 84, 156, 240, 396<br /> <br /> <!-- ws:start:WikiTextHeadingRule:0:<h3> --><h3 id="toc0"><a name="x--Compton temperament"></a><!-- ws:end:WikiTextHeadingRule:0 -->Compton temperament</h3> In terms of the normal list, compton adds 413343/409600 = |-14 10 -2 1> to the Pythagorean comma; however it can also be characterized by saying it adds 225/224. Compton, however, does not need to be used as a 7-limit temperament; in the 5-limit it becomes the rank two 5-limit temperament tempering out the Pythagorean comma. In terms of equal temperaments, it is the 12&72 temperament, and <a class="wiki_link" href="/72edo">72edo</a>, <a class="wiki_link" href="/84edo">84edo</a> or <a class="wiki_link" href="/240edo">240edo</a> make for good tunings. Possible generators are 21/20, 10/9, the secor, 6/5, 5/4, 7/5 and most importantly, 81/80. <br /> <br /> In the either the 5 or 7-limit, <a class="wiki_link" href="/240edo">240edo</a> is an excellent tuning, with 81/80 coming in at 15 cents exactly. The major third is sharp by 13.686 cents, and the minor third flat by 15.641 cents; adjusting these down and up by 15 cents puts them in excellent tune.<br /> <br /> In terms of the normal comma list, we may add 8019/8000 to get to the 11-limit version of compton, which also adds 441/440. For this <a class="wiki_link" href="/72edo">72edo</a> can be recommended as a tuning.<br /> <br /> Commas: 225/224, 250047/250000<br /> <br /> <a class="wiki_link" href="/POTE%20tuning">POTE generator</a>: 16.225<br /> <br /> Map: [<12 19 0 -22|, <0 0 1 2|]<br /> EDOs: 12, 60, 72, 228, 444<br /> <br /> 11-limit<br /> Commas: 225/224, 441/440, 4375/4356<br /> <br /> <a class="wiki_link" href="/POTE%20tuning">POTE generator</a>: 16.734<br /> <br /> Map: [<12 19 0 -22 -42|, <0 0 1 2 3|]<br /> EDOs: 12, 60, 72, 2940<br /> <br /> <!-- ws:start:WikiTextHeadingRule:2:<h3> --><h3 id="toc1"><a name="x--Catler temperament"></a><!-- ws:end:WikiTextHeadingRule:2 -->Catler temperament</h3> In terms of the normal comma list, catler is characterized by the addition of the schisma, 32805/32768, to the Pythagorean comma, though it can also be characterized as adding 81/80, 128/125 or 648/625. In any event, the 5-limit is exactly the same as the 5-limit of <a class="wiki_link" href="/12edo">12edo</a>. Catler can also be characterized as the 12&24 temperament. <a class="wiki_link" href="/36edo">36edo</a> or <a class="wiki_link" href="/48edo">48edo</a> are possible tunings, and 36/35, 21/20, 15/14, 8/7, 7/6, 6/5, 9/7 or 7/5 are possible generators. <br /> <br /> Commas: 81/80, 128/125<br /> <br /> <a class="wiki_link" href="/POTE%20tuning">POTE generator</a>: 26.790<br /> <br /> Map: [<12 19 28 0|, <0 0 0 1|]<br /> EDOs: 12, 36, 48, 132, 180</body></html>