Marveltwin: Difference between revisions

Revision as of 16:44, 21 June 2011

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[[toc|flat]]

=Marveltwin and Marvel=
The //marveltwin comma//, 325/324, bears a curiously close analogy to the marvel comma, 225/224. 325/324 can be added to the [[11-limit]] version of marvel, which tempers out 225/224 and 385/384, to get [[13-limit]] marvel, aka hecate. But it's also interesting to leave 11 out of it. From 225/224 we get that a 5-limit approximation for 7 is 225/224 * 7 = 225/32. Similarly from 325/324 we get a 5-limit approximation of 13 from 324/325 * 13 = 324/25. If we define the major/minor transformation of the 5-limit as the result of fixing 2 and 3 and replacing 5 by 24/5, then major/minor applied to 225/32 is 162/25, which is (324/25)/2. Similarly, major/minor applied to 324/25 is 225/16 = 2 * (225/32). 225/224 tells us that two 16/15 in a row are an approximate 8/7, and 325/324 tells us two 10/9 in a row are an approximate 16/13. Needless to say, major/minor applied to 16/15 is 10/9, and applied to 10/9 is 16/15.

=Rank five=
Comma: 325/324

13 and 15 limit minimax tuning
|| [1 0 0 0 0 0> ||
|| [0 1 0 0 0 0> ||
|| [2/3 4/3 1/3 0 0 -1/3> ||
|| [2/3 4/3 -2/3 1 0 -1/3> ||
|| [2/3 4/3 -2/3 0 1 -1/3> ||
|| [2/3 4/3 -2/3 0 0 2/3> ||

Fifths are pure; 5, 7, 11 and 13 are all flat by (325/324)^(1/3), which is 1.778 cents. 
Eigenmonzo subgroup: 2.3.7/5.11/5.13/5

Map: 
|| <1 0 0 0 0 2] ||
|| <0 1 0 0 0 4] ||
|| <0 0 1 0 0 -2] ||
|| <0 0 0 1 0 0] ||
|| <0 0 0 0 1 0] ||

Edos: 7, 12, 15, 19, 26, 34, 41, 46, 53, 72, 87, 121, 140, 159, 193, 212, 299, 333

=Rank four=

==225/224==

13-limit eigenmonzo subgroup: 2.7.11/5.13/5
15-limit eigenmonzo subgroup: 2.7.15/11.15/13

Map:
|| <1 0 0 -5 0 2] ||
|| <0 1 0 2 0 4] ||
|| <0 0 1 2 0 -2] ||
|| <0 0 0 0 1 0]] ||
Edos: 12, 19, 41, 53, 72, 166

==385/384==

==364/363==

==441/440==

==169/168==

==540/539==

==352/351==

==625/624==

=Rank three=

==Portending==
Commas: 325/324, 364/363, 441/440

==Marvel (Hecate)==
Commas: 225/224, 325/324, 385/384

==Sumatra==
Commas: 325/324, 385/384, 625/624

EDOs: 15, 19, 34, 53, 72, 87, 140, 159, 212, 299
Optimal patent val: [[299edo]]
Badness: 0.000680

Original HTML content:

<html><head><title>Marveltwin</title></head><body><!-- ws:start:WikiTextTocRule:30:&lt;img id=&quot;wikitext@@toc@@flat&quot; class=&quot;WikiMedia WikiMediaTocFlat&quot; title=&quot;Table of Contents&quot; src=&quot;/site/embedthumbnail/toc/flat?w=100&amp;h=16&quot;/&gt; --><!-- ws:end:WikiTextTocRule:30 --><!-- ws:start:WikiTextTocRule:31: --><a href="#Marveltwin and Marvel">Marveltwin and Marvel</a><!-- ws:end:WikiTextTocRule:31 --><!-- ws:start:WikiTextTocRule:32: --> | <a href="#Rank five">Rank five</a><!-- ws:end:WikiTextTocRule:32 --><!-- ws:start:WikiTextTocRule:33: --> | <a href="#Rank four">Rank four</a><!-- ws:end:WikiTextTocRule:33 --><!-- ws:start:WikiTextTocRule:34: --><!-- ws:end:WikiTextTocRule:34 --><!-- ws:start:WikiTextTocRule:35: --><!-- ws:end:WikiTextTocRule:35 --><!-- ws:start:WikiTextTocRule:36: --><!-- ws:end:WikiTextTocRule:36 --><!-- ws:start:WikiTextTocRule:37: --><!-- ws:end:WikiTextTocRule:37 --><!-- ws:start:WikiTextTocRule:38: --><!-- ws:end:WikiTextTocRule:38 --><!-- ws:start:WikiTextTocRule:39: --><!-- ws:end:WikiTextTocRule:39 --><!-- ws:start:WikiTextTocRule:40: --><!-- ws:end:WikiTextTocRule:40 --><!-- ws:start:WikiTextTocRule:41: --><!-- ws:end:WikiTextTocRule:41 --><!-- ws:start:WikiTextTocRule:42: --> | <a href="#Rank three">Rank three</a><!-- ws:end:WikiTextTocRule:42 --><!-- ws:start:WikiTextTocRule:43: --><!-- ws:end:WikiTextTocRule:43 --><!-- ws:start:WikiTextTocRule:44: --><!-- ws:end:WikiTextTocRule:44 --><!-- ws:start:WikiTextTocRule:45: --><!-- ws:end:WikiTextTocRule:45 --><!-- ws:start:WikiTextTocRule:46: -->
<!-- ws:end:WikiTextTocRule:46 --><br />
<!-- ws:start:WikiTextHeadingRule:0:&lt;h1&gt; --><h1 id="toc0"><a name="Marveltwin and Marvel"></a><!-- ws:end:WikiTextHeadingRule:0 -->Marveltwin and Marvel</h1>
The <em>marveltwin comma</em>, 325/324, bears a curiously close analogy to the marvel comma, 225/224. 325/324 can be added to the <a class="wiki_link" href="/11-limit">11-limit</a> version of marvel, which tempers out 225/224 and 385/384, to get <a class="wiki_link" href="/13-limit">13-limit</a> marvel, aka hecate. But it's also interesting to leave 11 out of it. From 225/224 we get that a 5-limit approximation for 7 is 225/224 * 7 = 225/32. Similarly from 325/324 we get a 5-limit approximation of 13 from 324/325 * 13 = 324/25. If we define the major/minor transformation of the 5-limit as the result of fixing 2 and 3 and replacing 5 by 24/5, then major/minor applied to 225/32 is 162/25, which is (324/25)/2. Similarly, major/minor applied to 324/25 is 225/16 = 2 * (225/32). 225/224 tells us that two 16/15 in a row are an approximate 8/7, and 325/324 tells us two 10/9 in a row are an approximate 16/13. Needless to say, major/minor applied to 16/15 is 10/9, and applied to 10/9 is 16/15.<br />
<br />
<!-- ws:start:WikiTextHeadingRule:2:&lt;h1&gt; --><h1 id="toc1"><a name="Rank five"></a><!-- ws:end:WikiTextHeadingRule:2 -->Rank five</h1>
Comma: 325/324<br />
<br />
13 and 15 limit minimax tuning<br />


<table class="wiki_table">
    <tr>
        <td>[1 0 0 0 0 0&gt;<br />
</td>
    </tr>
    <tr>
        <td>[0 1 0 0 0 0&gt;<br />
</td>
    </tr>
    <tr>
        <td>[2/3 4/3 1/3 0 0 -1/3&gt;<br />
</td>
    </tr>
    <tr>
        <td>[2/3 4/3 -2/3 1 0 -1/3&gt;<br />
</td>
    </tr>
    <tr>
        <td>[2/3 4/3 -2/3 0 1 -1/3&gt;<br />
</td>
    </tr>
    <tr>
        <td>[2/3 4/3 -2/3 0 0 2/3&gt;<br />
</td>
    </tr>
</table>

<br />
Fifths are pure; 5, 7, 11 and 13 are all flat by (325/324)^(1/3), which is 1.778 cents. <br />
Eigenmonzo subgroup: 2.3.7/5.11/5.13/5<br />
<br />
Map: <br />


<table class="wiki_table">
    <tr>
        <td>&lt;1 0 0 0 0 2]<br />
</td>
    </tr>
    <tr>
        <td>&lt;0 1 0 0 0 4]<br />
</td>
    </tr>
    <tr>
        <td>&lt;0 0 1 0 0 -2]<br />
</td>
    </tr>
    <tr>
        <td>&lt;0 0 0 1 0 0]<br />
</td>
    </tr>
    <tr>
        <td>&lt;0 0 0 0 1 0]<br />
</td>
    </tr>
</table>

<br />
Edos: 7, 12, 15, 19, 26, 34, 41, 46, 53, 72, 87, 121, 140, 159, 193, 212, 299, 333<br />
<br />
<!-- ws:start:WikiTextHeadingRule:4:&lt;h1&gt; --><h1 id="toc2"><a name="Rank four"></a><!-- ws:end:WikiTextHeadingRule:4 -->Rank four</h1>
<br />
<!-- ws:start:WikiTextHeadingRule:6:&lt;h2&gt; --><h2 id="toc3"><a name="Rank four-225/224"></a><!-- ws:end:WikiTextHeadingRule:6 -->225/224</h2>
<br />
13-limit eigenmonzo subgroup: 2.7.11/5.13/5<br />
15-limit eigenmonzo subgroup: 2.7.15/11.15/13<br />
<br />
Map:<br />


<table class="wiki_table">
    <tr>
        <td>&lt;1 0 0 -5 0 2]<br />
</td>
    </tr>
    <tr>
        <td>&lt;0 1 0 2 0 4]<br />
</td>
    </tr>
    <tr>
        <td>&lt;0 0 1 2 0 -2]<br />
</td>
    </tr>
    <tr>
        <td>&lt;0 0 0 0 1 0]]<br />
</td>
    </tr>
</table>

Edos: 12, 19, 41, 53, 72, 166<br />
<br />
<!-- ws:start:WikiTextHeadingRule:8:&lt;h2&gt; --><h2 id="toc4"><a name="Rank four-385/384"></a><!-- ws:end:WikiTextHeadingRule:8 -->385/384</h2>
<br />
<!-- ws:start:WikiTextHeadingRule:10:&lt;h2&gt; --><h2 id="toc5"><a name="Rank four-364/363"></a><!-- ws:end:WikiTextHeadingRule:10 -->364/363</h2>
<br />
<!-- ws:start:WikiTextHeadingRule:12:&lt;h2&gt; --><h2 id="toc6"><a name="Rank four-441/440"></a><!-- ws:end:WikiTextHeadingRule:12 -->441/440</h2>
<br />
<!-- ws:start:WikiTextHeadingRule:14:&lt;h2&gt; --><h2 id="toc7"><a name="Rank four-169/168"></a><!-- ws:end:WikiTextHeadingRule:14 -->169/168</h2>
<br />
<!-- ws:start:WikiTextHeadingRule:16:&lt;h2&gt; --><h2 id="toc8"><a name="Rank four-540/539"></a><!-- ws:end:WikiTextHeadingRule:16 -->540/539</h2>
<br />
<!-- ws:start:WikiTextHeadingRule:18:&lt;h2&gt; --><h2 id="toc9"><a name="Rank four-352/351"></a><!-- ws:end:WikiTextHeadingRule:18 -->352/351</h2>
<br />
<!-- ws:start:WikiTextHeadingRule:20:&lt;h2&gt; --><h2 id="toc10"><a name="Rank four-625/624"></a><!-- ws:end:WikiTextHeadingRule:20 -->625/624</h2>
<br />
<!-- ws:start:WikiTextHeadingRule:22:&lt;h1&gt; --><h1 id="toc11"><a name="Rank three"></a><!-- ws:end:WikiTextHeadingRule:22 -->Rank three</h1>
<br />
<!-- ws:start:WikiTextHeadingRule:24:&lt;h2&gt; --><h2 id="toc12"><a name="Rank three-Portending"></a><!-- ws:end:WikiTextHeadingRule:24 -->Portending</h2>
Commas: 325/324, 364/363, 441/440<br />
<br />
<!-- ws:start:WikiTextHeadingRule:26:&lt;h2&gt; --><h2 id="toc13"><a name="Rank three-Marvel (Hecate)"></a><!-- ws:end:WikiTextHeadingRule:26 -->Marvel (Hecate)</h2>
Commas: 225/224, 325/324, 385/384<br />
<br />
<!-- ws:start:WikiTextHeadingRule:28:&lt;h2&gt; --><h2 id="toc14"><a name="Rank three-Sumatra"></a><!-- ws:end:WikiTextHeadingRule:28 -->Sumatra</h2>
Commas: 325/324, 385/384, 625/624<br />
<br />
EDOs: 15, 19, 34, 53, 72, 87, 140, 159, 212, 299<br />
Optimal patent val: <a class="wiki_link" href="/299edo">299edo</a><br />
Badness: 0.000680</body></html>

Marveltwin: Difference between revisions

Revision as of 16:44, 21 June 2011

IMPORTED REVISION FROM WIKISPACES

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