Tour of regular temperaments: Difference between revisions
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=Rank-2 (including linear) temperaments[[#lineartemperaments]]= | =Rank-2 (including linear) temperaments[[#lineartemperaments]]= | ||
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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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.<br /> | |||
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Regular temperaments of ranks two and three are cataloged <a class="wiki_link" href="/Optimal%20patent%20val">here</a>. Rank-2 temperaments are also listed <a class="wiki_link" href="/Proposed%20names%20for%20rank%202%20temperaments">here</a> by their generator mappings and <a class="wiki_link" href="/Map%20of%20rank-2%20temperaments">here</a> by their generator size. There is also <a class="wiki_link" href="/Graham%20Breed">Graham Breed</a>'s <a class="wiki_link_ext" href="http://x31eq.com/catalog2.html" rel="nofollow">giant list of regular temperaments</a>.<br /> | Regular temperaments of ranks two and three are cataloged <a class="wiki_link" href="/Optimal%20patent%20val">here</a>. Rank-2 temperaments are also listed <a class="wiki_link" href="/Proposed%20names%20for%20rank%202%20temperaments">here</a> by their generator mappings and <a class="wiki_link" href="/Map%20of%20rank-2%20temperaments">here</a> by their generator size. See also the <a class="wiki_link" href="/pergen">pergens</a> page. There is also <a class="wiki_link" href="/Graham%20Breed">Graham Breed</a>'s <a class="wiki_link_ext" href="http://x31eq.com/catalog2.html" rel="nofollow">giant list of regular temperaments</a>.<br /> | ||
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<!-- ws:start:WikiTextHeadingRule:10:&lt;h2&gt; --><h2 id="toc5"><a name="Rank-2 (including linear) temperaments-Families"></a><!-- ws:end:WikiTextHeadingRule:10 -->Families</h2> | <!-- ws:start:WikiTextHeadingRule:10:&lt;h2&gt; --><h2 id="toc5"><a name="Rank-2 (including linear) temperaments-Families"></a><!-- ws:end:WikiTextHeadingRule:10 -->Families</h2> | ||