Pythagorean comma: Difference between revisions
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Wikispaces>Andrew_Heathwaite **Imported revision 282666330 - Original comment: ** |
Wikispaces>Andrew_Heathwaite **Imported revision 282666442 - 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:Andrew_Heathwaite|Andrew_Heathwaite]] and made on <tt>2011-12-05 21:40: | : This revision was by author [[User:Andrew_Heathwaite|Andrew_Heathwaite]] and made on <tt>2011-12-05 21:40:32 UTC</tt>.<br> | ||
: The original revision id was <tt> | : The original revision id was <tt>282666442</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> | ||
<h4>Original Wikitext content:</h4> | <h4>Original Wikitext content:</h4> | ||
<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 or ditonic comma (about 23.460¢) is the interval 531441/524288 = |-19 12> (see [[monzo]]). It could also be called the 12-comma as it is the amount by which twelve fifths exceed seven octaves, or in other words (3/2)^12/2^7 and it also can be written as the ratio between the [[2187_2048|apotome]] and the [[256_243|Pythagorean minor second]], (2187/2048)/(256/243). For EDOs up to 300, it is tempered out if and only if the EDO is a multiple of 12, and hence for instance by [[24edo]], [[72edo]] and [[84edo]]. | <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 or ditonic comma (about 23.460¢) is the interval 531441/524288 = |-19 12> (see [[monzo]]). It could also be called the 12-comma as it is the amount by which twelve fifths exceed seven octaves, or in other words (3/2)^12/2^7 and it also can be written as the ratio between the [[2187_2048|apotome]] and the [[256_243|Pythagorean minor second]], (2187/2048)/(256/243). For EDOs up to 300, it is tempered out if and only if the EDO is a multiple of 12, and hence for instance by [[24edo]], [[72edo]] and [[84edo]]. | ||
See: [[Gallery of Just Intervals]], [[comma]] | |||
[[http://en.wikipedia.org/wiki/Pythagorean_comma|Wikipedia article]]</pre></div> | [[http://en.wikipedia.org/wiki/Pythagorean_comma|Wikipedia article]]</pre></div> | ||
<h4>Original HTML content:</h4> | <h4>Original HTML content:</h4> | ||
<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 comma</title></head><body>The Pythagorean or ditonic comma (about 23.460¢) is the interval 531441/524288 = |-19 12&gt; (see <a class="wiki_link" href="/monzo">monzo</a>). It could also be called the 12-comma as it is the amount by which twelve fifths exceed seven octaves, or in other words (3/2)^12/2^7 and it also can be written as the ratio between the <a class="wiki_link" href="/2187_2048">apotome</a> and the <a class="wiki_link" href="/256_243">Pythagorean minor second</a>, (2187/2048)/(256/243). For EDOs up to 300, it is tempered out if and only if the EDO is a multiple of 12, and hence for instance by <a class="wiki_link" href="/24edo">24edo</a>, <a class="wiki_link" href="/72edo">72edo</a> and <a class="wiki_link" href="/84edo">84edo</a>.<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 comma</title></head><body>The Pythagorean or ditonic comma (about 23.460¢) is the interval 531441/524288 = |-19 12&gt; (see <a class="wiki_link" href="/monzo">monzo</a>). It could also be called the 12-comma as it is the amount by which twelve fifths exceed seven octaves, or in other words (3/2)^12/2^7 and it also can be written as the ratio between the <a class="wiki_link" href="/2187_2048">apotome</a> and the <a class="wiki_link" href="/256_243">Pythagorean minor second</a>, (2187/2048)/(256/243). For EDOs up to 300, it is tempered out if and only if the EDO is a multiple of 12, and hence for instance by <a class="wiki_link" href="/24edo">24edo</a>, <a class="wiki_link" href="/72edo">72edo</a> and <a class="wiki_link" href="/84edo">84edo</a>.<br /> | ||
<br /> | |||
See: <a class="wiki_link" href="/Gallery%20of%20Just%20Intervals">Gallery of Just Intervals</a>, <a class="wiki_link" href="/comma">comma</a><br /> | |||
<br /> | <br /> | ||
<a class="wiki_link_ext" href="http://en.wikipedia.org/wiki/Pythagorean_comma" rel="nofollow">Wikipedia article</a></body></html></pre></div> | <a class="wiki_link_ext" href="http://en.wikipedia.org/wiki/Pythagorean_comma" rel="nofollow">Wikipedia article</a></body></html></pre></div> | ||
Revision as of 21:40, 5 December 2011
IMPORTED REVISION FROM WIKISPACES
This is an imported revision from Wikispaces. The revision metadata is included below for reference:
- This revision was by author Andrew_Heathwaite and made on 2011-12-05 21:40:32 UTC.
- The original revision id was 282666442.
- 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 or ditonic comma (about 23.460¢) is the interval 531441/524288 = |-19 12> (see [[monzo]]). It could also be called the 12-comma as it is the amount by which twelve fifths exceed seven octaves, or in other words (3/2)^12/2^7 and it also can be written as the ratio between the [[2187_2048|apotome]] and the [[256_243|Pythagorean minor second]], (2187/2048)/(256/243). For EDOs up to 300, it is tempered out if and only if the EDO is a multiple of 12, and hence for instance by [[24edo]], [[72edo]] and [[84edo]]. See: [[Gallery of Just Intervals]], [[comma]] [[http://en.wikipedia.org/wiki/Pythagorean_comma|Wikipedia article]]
Original HTML content:
<html><head><title>Pythagorean comma</title></head><body>The Pythagorean or ditonic comma (about 23.460¢) is the interval 531441/524288 = |-19 12> (see <a class="wiki_link" href="/monzo">monzo</a>). It could also be called the 12-comma as it is the amount by which twelve fifths exceed seven octaves, or in other words (3/2)^12/2^7 and it also can be written as the ratio between the <a class="wiki_link" href="/2187_2048">apotome</a> and the <a class="wiki_link" href="/256_243">Pythagorean minor second</a>, (2187/2048)/(256/243). For EDOs up to 300, it is tempered out if and only if the EDO is a multiple of 12, and hence for instance by <a class="wiki_link" href="/24edo">24edo</a>, <a class="wiki_link" href="/72edo">72edo</a> and <a class="wiki_link" href="/84edo">84edo</a>.<br /> <br /> See: <a class="wiki_link" href="/Gallery%20of%20Just%20Intervals">Gallery of Just Intervals</a>, <a class="wiki_link" href="/comma">comma</a><br /> <br /> <a class="wiki_link_ext" href="http://en.wikipedia.org/wiki/Pythagorean_comma" rel="nofollow">Wikipedia article</a></body></html>