Tour of regular temperaments: Difference between revisions

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=Rank-2 (including linear) temperaments[[#lineartemperaments]]=  
=Rank-2 (including linear) temperaments[[#lineartemperaments]]=  


P-limit rank-2 temperaments map all intervals of p-limit JI using a set of 2-dimensional coordinates, thus rank-2 temperaments are said to have two generators, though they may have any number of step-sizes. This means that a rank-2 temperament is defined by a set of 2 vals, one val for each generator. The larger generator is called the period, as the temperament will repeat at that interval, and is often a fraction of an octave; if it is exactly an octave, the temperament is said to be a linear temperament. Rank-2 temperaments can be reduced to a related rank-1 temperament by tempering out an additional comma that is not already tempered out. For example, 5-limit meantone temperament, which is rank-2 (defined by tempering the syntonic comma of 81/80 out of 3-dimensional 5-limit JI), can be reduced to 12-ET by tempering out the Pythagorean comma.
A p-limit rank-2 temperament maps all intervals of p-limit JI using a set of 2-dimensional coordinates, thus a rank-2 temperament is said to have two generators, though it may have any number of step-sizes. This means that a rank-2 temperament is defined by a period-generator mapping, a set of 2 vals, one val for each generator. The larger generator is called the period, as the temperament will repeat at that interval, and is often a fraction of an octave; if it is exactly an octave, the temperament is said to be a linear temperament. Rank-2 temperaments can be reduced to a related rank-1 temperament by tempering out an additional comma that is not already tempered out. For example, 5-limit meantone temperament, which is rank-2 (defined by tempering the syntonic comma of 81/80 out of 3-dimensional 5-limit JI), can be reduced to 12-ET by tempering out the Pythagorean comma.


Regular temperaments of ranks two and three are cataloged [[Optimal patent val|here]]. Rank-2 temperaments are also listed [[Proposed names for rank 2 temperaments|here]] by their generator mappings and [[Map of rank-2 temperaments|here]] by their generator size. There is also [[Graham Breed]]'s [[http://x31eq.com/catalog2.html|giant list of regular temperaments]].
Regular temperaments of ranks two and three are cataloged [[Optimal patent val|here]]. Rank-2 temperaments are also listed [[Proposed names for rank 2 temperaments|here]] by their generator mappings and [[Map of rank-2 temperaments|here]] by their generator size. See also the [[pergen|pergens]] page. There is also [[Graham Breed]]'s [[http://x31eq.com/catalog2.html|giant list of regular temperaments]].


==Families==  
==Families==  
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&lt;!-- ws:start:WikiTextHeadingRule:8:&amp;lt;h1&amp;gt; --&gt;&lt;h1 id="toc4"&gt;&lt;a name="Rank-2 (including linear) temperaments"&gt;&lt;/a&gt;&lt;!-- ws:end:WikiTextHeadingRule:8 --&gt;Rank-2 (including linear) temperaments&lt;!-- ws:start:WikiTextAnchorRule:368:&amp;lt;img src=&amp;quot;/i/anchor.gif&amp;quot; class=&amp;quot;WikiAnchor&amp;quot; alt=&amp;quot;Anchor&amp;quot; id=&amp;quot;wikitext@@anchor@@lineartemperaments&amp;quot; title=&amp;quot;Anchor: lineartemperaments&amp;quot;/&amp;gt; --&gt;&lt;a name="lineartemperaments"&gt;&lt;/a&gt;&lt;!-- ws:end:WikiTextAnchorRule:368 --&gt;&lt;/h1&gt;
&lt;!-- ws:start:WikiTextHeadingRule:8:&amp;lt;h1&amp;gt; --&gt;&lt;h1 id="toc4"&gt;&lt;a name="Rank-2 (including linear) temperaments"&gt;&lt;/a&gt;&lt;!-- ws:end:WikiTextHeadingRule:8 --&gt;Rank-2 (including linear) temperaments&lt;!-- ws:start:WikiTextAnchorRule:368:&amp;lt;img src=&amp;quot;/i/anchor.gif&amp;quot; class=&amp;quot;WikiAnchor&amp;quot; alt=&amp;quot;Anchor&amp;quot; id=&amp;quot;wikitext@@anchor@@lineartemperaments&amp;quot; title=&amp;quot;Anchor: lineartemperaments&amp;quot;/&amp;gt; --&gt;&lt;a name="lineartemperaments"&gt;&lt;/a&gt;&lt;!-- ws:end:WikiTextAnchorRule:368 --&gt;&lt;/h1&gt;
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P-limit rank-2 temperaments map all intervals of p-limit JI using a set of 2-dimensional coordinates, thus rank-2 temperaments are said to have two generators, though they may have any number of step-sizes. This means that a rank-2 temperament is defined by a set of 2 vals, one val for each generator. The larger generator is called the period, as the temperament will repeat at that interval, and is often a fraction of an octave; if it is exactly an octave, the temperament is said to be a linear temperament. Rank-2 temperaments can be reduced to a related rank-1 temperament by tempering out an additional comma that is not already tempered out. For example, 5-limit meantone temperament, which is rank-2 (defined by tempering the syntonic comma of 81/80 out of 3-dimensional 5-limit JI), can be reduced to 12-ET by tempering out the Pythagorean comma.&lt;br /&gt;
A p-limit rank-2 temperament maps all intervals of p-limit JI using a set of 2-dimensional coordinates, thus a rank-2 temperament is said to have two generators, though it may have any number of step-sizes. This means that a rank-2 temperament is defined by a period-generator mapping, a set of 2 vals, one val for each generator. The larger generator is called the period, as the temperament will repeat at that interval, and is often a fraction of an octave; if it is exactly an octave, the temperament is said to be a linear temperament. Rank-2 temperaments can be reduced to a related rank-1 temperament by tempering out an additional comma that is not already tempered out. For example, 5-limit meantone temperament, which is rank-2 (defined by tempering the syntonic comma of 81/80 out of 3-dimensional 5-limit JI), can be reduced to 12-ET by tempering out the Pythagorean comma.&lt;br /&gt;
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Regular temperaments of ranks two and three are cataloged &lt;a class="wiki_link" href="/Optimal%20patent%20val"&gt;here&lt;/a&gt;. Rank-2 temperaments are also listed &lt;a class="wiki_link" href="/Proposed%20names%20for%20rank%202%20temperaments"&gt;here&lt;/a&gt; by their generator mappings and &lt;a class="wiki_link" href="/Map%20of%20rank-2%20temperaments"&gt;here&lt;/a&gt; by their generator size. There is also &lt;a class="wiki_link" href="/Graham%20Breed"&gt;Graham Breed&lt;/a&gt;'s &lt;a class="wiki_link_ext" href="http://x31eq.com/catalog2.html" rel="nofollow"&gt;giant list of regular temperaments&lt;/a&gt;.&lt;br /&gt;
Regular temperaments of ranks two and three are cataloged &lt;a class="wiki_link" href="/Optimal%20patent%20val"&gt;here&lt;/a&gt;. Rank-2 temperaments are also listed &lt;a class="wiki_link" href="/Proposed%20names%20for%20rank%202%20temperaments"&gt;here&lt;/a&gt; by their generator mappings and &lt;a class="wiki_link" href="/Map%20of%20rank-2%20temperaments"&gt;here&lt;/a&gt; by their generator size. See also the &lt;a class="wiki_link" href="/pergen"&gt;pergens&lt;/a&gt; page. There is also &lt;a class="wiki_link" href="/Graham%20Breed"&gt;Graham Breed&lt;/a&gt;'s &lt;a class="wiki_link_ext" href="http://x31eq.com/catalog2.html" rel="nofollow"&gt;giant list of regular temperaments&lt;/a&gt;.&lt;br /&gt;
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&lt;!-- ws:start:WikiTextHeadingRule:10:&amp;lt;h2&amp;gt; --&gt;&lt;h2 id="toc5"&gt;&lt;a name="Rank-2 (including linear) temperaments-Families"&gt;&lt;/a&gt;&lt;!-- ws:end:WikiTextHeadingRule:10 --&gt;Families&lt;/h2&gt;