13edo: Difference between revisions

Wikispaces>igliashon
**Imported revision 252640040 - Original comment: **
Wikispaces>xenjacob
**Imported revision 264211553 - 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:igliashon|igliashon]] and made on <tt>2011-09-10 13:06:28 UTC</tt>.<br>
: This revision was by author [[User:xenjacob|xenjacob]] and made on <tt>2011-10-12 20:44:02 UTC</tt>.<br>
: The original revision id was <tt>252640040</tt>.<br>
: The original revision id was <tt>264211553</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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=13 tone equal temperament / 13edo=  
=13 tone equal temperament / 13edo=  
13edo refers to a tuning system which divides the octave (frequency ratio 2:1) into 13 equal parts. The steps are of similar size to those of 12edo (albeit squashed), while the intervals between a minor third &amp; major sixth are xenharmonic (not similar to anything available in 12edo).
13edo refers to a tuning system which divides the octave (frequency ratio 2:1) into 13 equal parts. The steps are of similar size to those of 12edo (albeit squashed), while the intervals between a minor third &amp; major sixth are xenharmonic (not similar to anything available in 12edo).
|| Degree || Cents ||= Approximate Ratios* || 6L1s Names || 5L3s Names ||
|| Degree || Cents ||= Approximate Ratios* || 6L1s Names || 5L3s Names || [[26edo]] names ||
|| 0 || 0 ||= 1/1 || C || C ||
|| 0 || 0 ||= 1/1 || C || C || C ||
|| 1 || 92.3077 ||= 22/21, 55/52, 117/110, 26/25 || C#/Db || C#/Db ||
|| 1 || 92.3077 ||= 22/21, 55/52, 117/110, 26/25 || C#/Db || C#/Db || Cx/Dbb ||
|| 2 || 184.6154 ||= 10/9, 9/8, 11/10 || D || D ||
|| 2 || 184.6154 ||= 10/9, 9/8, 11/10 || D || D || D ||
|| 3 || 276.9231 ||= 13/11, 7/6 || D#/Eb || D#/Eb ||
|| 3 || 276.9231 ||= 13/11, 7/6 || D#/Eb || D#/Eb || Dx/Ebb ||
|| 4 || 369.2308 ||= 5/4, 16/13, 11/9, 26/21 || E || E ||
|| 4 || 369.2308 ||= 5/4, 16/13, 11/9, 26/21 || E || E || E ||
|| 5 || 461.5385 ||= 13/10, 21/16 || E#/Fb || F ||
|| 5 || 461.5385 ||= 13/10, 21/16 || E#/Fb || F || Ex/Fb ||
|| 6 || 553.84 ||= 11/8, 18/13 || F || F#/Gb ||
|| 6 || 553.84 ||= 11/8, 18/13 || F || F#/Gb || F# ||
|| 7 || 646.15 ||= 16/11, 13/9 || F#/Gb || G ||
|| 7 || 646.15 ||= 16/11, 13/9 || F#/Gb || G || Gb ||
|| 8 || 738.46 ||= 20/13, 32/21 || G || G#/Hb ||
|| 8 || 738.46 ||= 20/13, 32/21 || G || G#/Hb || G# ||
|| 9 || 830.77 ||= 8/5, 13/8, 18/11, 21/13 || G#/Ab || H ||
|| 9 || 830.77 ||= 8/5, 13/8, 18/11, 21/13 || G#/Ab || H || Ab ||
|| 10 || 923.08 ||= 22/13, 12/7 || A || A ||
|| 10 || 923.08 ||= 22/13, 12/7 || A || A || A# ||
|| 11 || 1015.38 ||= 9/5, 16/9, 20/11 || A#/Bb || A#/Bb ||
|| 11 || 1015.38 ||= 9/5, 16/9, 20/11 || A#/Bb || A#/Bb || Bb ||
|| 12 || 1107.69 ||= 21/11, 25/13, 104/55 || B/Cb || B ||
|| 12 || 1107.69 ||= 21/11, 25/13, 104/55 || B/Cb || B || B#/Cbb ||
|| 13 || 1200 ||= 2/1 || C/B# || C ||
|| 13 || 1200 ||= 2/1 || C/B# || C || C ||
*based on treating 13-EDO as a 2.5.9.11.13.21 subgroup temperament; other approaches are possible.
*based on treating 13-EDO as a 2.5.9.11.13.21 subgroup temperament; other approaches are possible.


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&lt;/td&gt;
&lt;/td&gt;
         &lt;td&gt;5L3s Names&lt;br /&gt;
         &lt;td&gt;5L3s Names&lt;br /&gt;
&lt;/td&gt;
        &lt;td&gt;&lt;a class="wiki_link" href="/26edo"&gt;26edo&lt;/a&gt; names&lt;br /&gt;
&lt;/td&gt;
&lt;/td&gt;
     &lt;/tr&gt;
     &lt;/tr&gt;
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&lt;/td&gt;
&lt;/td&gt;
         &lt;td style="text-align: center;"&gt;1/1&lt;br /&gt;
         &lt;td style="text-align: center;"&gt;1/1&lt;br /&gt;
&lt;/td&gt;
        &lt;td&gt;C&lt;br /&gt;
&lt;/td&gt;
&lt;/td&gt;
         &lt;td&gt;C&lt;br /&gt;
         &lt;td&gt;C&lt;br /&gt;
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&lt;/td&gt;
&lt;/td&gt;
         &lt;td&gt;C#/Db&lt;br /&gt;
         &lt;td&gt;C#/Db&lt;br /&gt;
&lt;/td&gt;
        &lt;td&gt;Cx/Dbb&lt;br /&gt;
&lt;/td&gt;
&lt;/td&gt;
     &lt;/tr&gt;
     &lt;/tr&gt;
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&lt;/td&gt;
&lt;/td&gt;
         &lt;td style="text-align: center;"&gt;10/9, 9/8, 11/10&lt;br /&gt;
         &lt;td style="text-align: center;"&gt;10/9, 9/8, 11/10&lt;br /&gt;
&lt;/td&gt;
        &lt;td&gt;D&lt;br /&gt;
&lt;/td&gt;
&lt;/td&gt;
         &lt;td&gt;D&lt;br /&gt;
         &lt;td&gt;D&lt;br /&gt;
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&lt;/td&gt;
&lt;/td&gt;
         &lt;td&gt;D#/Eb&lt;br /&gt;
         &lt;td&gt;D#/Eb&lt;br /&gt;
&lt;/td&gt;
        &lt;td&gt;Dx/Ebb&lt;br /&gt;
&lt;/td&gt;
&lt;/td&gt;
     &lt;/tr&gt;
     &lt;/tr&gt;
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&lt;/td&gt;
&lt;/td&gt;
         &lt;td style="text-align: center;"&gt;5/4, 16/13, 11/9, 26/21&lt;br /&gt;
         &lt;td style="text-align: center;"&gt;5/4, 16/13, 11/9, 26/21&lt;br /&gt;
&lt;/td&gt;
        &lt;td&gt;E&lt;br /&gt;
&lt;/td&gt;
&lt;/td&gt;
         &lt;td&gt;E&lt;br /&gt;
         &lt;td&gt;E&lt;br /&gt;
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&lt;/td&gt;
&lt;/td&gt;
         &lt;td&gt;F&lt;br /&gt;
         &lt;td&gt;F&lt;br /&gt;
&lt;/td&gt;
        &lt;td&gt;Ex/Fb&lt;br /&gt;
&lt;/td&gt;
&lt;/td&gt;
     &lt;/tr&gt;
     &lt;/tr&gt;
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&lt;/td&gt;
&lt;/td&gt;
         &lt;td&gt;F#/Gb&lt;br /&gt;
         &lt;td&gt;F#/Gb&lt;br /&gt;
&lt;/td&gt;
        &lt;td&gt;F#&lt;br /&gt;
&lt;/td&gt;
&lt;/td&gt;
     &lt;/tr&gt;
     &lt;/tr&gt;
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&lt;/td&gt;
&lt;/td&gt;
         &lt;td&gt;G&lt;br /&gt;
         &lt;td&gt;G&lt;br /&gt;
&lt;/td&gt;
        &lt;td&gt;Gb&lt;br /&gt;
&lt;/td&gt;
&lt;/td&gt;
     &lt;/tr&gt;
     &lt;/tr&gt;
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&lt;/td&gt;
&lt;/td&gt;
         &lt;td&gt;G#/Hb&lt;br /&gt;
         &lt;td&gt;G#/Hb&lt;br /&gt;
&lt;/td&gt;
        &lt;td&gt;G#&lt;br /&gt;
&lt;/td&gt;
&lt;/td&gt;
     &lt;/tr&gt;
     &lt;/tr&gt;
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&lt;/td&gt;
&lt;/td&gt;
         &lt;td&gt;H&lt;br /&gt;
         &lt;td&gt;H&lt;br /&gt;
&lt;/td&gt;
        &lt;td&gt;Ab&lt;br /&gt;
&lt;/td&gt;
&lt;/td&gt;
     &lt;/tr&gt;
     &lt;/tr&gt;
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&lt;/td&gt;
&lt;/td&gt;
         &lt;td&gt;A&lt;br /&gt;
         &lt;td&gt;A&lt;br /&gt;
&lt;/td&gt;
        &lt;td&gt;A#&lt;br /&gt;
&lt;/td&gt;
&lt;/td&gt;
     &lt;/tr&gt;
     &lt;/tr&gt;
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&lt;/td&gt;
&lt;/td&gt;
         &lt;td&gt;A#/Bb&lt;br /&gt;
         &lt;td&gt;A#/Bb&lt;br /&gt;
&lt;/td&gt;
        &lt;td&gt;Bb&lt;br /&gt;
&lt;/td&gt;
&lt;/td&gt;
     &lt;/tr&gt;
     &lt;/tr&gt;
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&lt;/td&gt;
&lt;/td&gt;
         &lt;td&gt;B&lt;br /&gt;
         &lt;td&gt;B&lt;br /&gt;
&lt;/td&gt;
        &lt;td&gt;B#/Cbb&lt;br /&gt;
&lt;/td&gt;
&lt;/td&gt;
     &lt;/tr&gt;
     &lt;/tr&gt;
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&lt;/td&gt;
&lt;/td&gt;
         &lt;td&gt;C/B#&lt;br /&gt;
         &lt;td&gt;C/B#&lt;br /&gt;
&lt;/td&gt;
        &lt;td&gt;C&lt;br /&gt;
&lt;/td&gt;
&lt;/td&gt;
         &lt;td&gt;C&lt;br /&gt;
         &lt;td&gt;C&lt;br /&gt;
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  Due to the prime character of the number 13, 13edo can form several xenharmonic &lt;a class="wiki_link" href="/MOSScales"&gt;moment of symmetry scales&lt;/a&gt;. The diagram below shows five &amp;quot;families&amp;quot; of MOS scales: those generated by making a chain of 2\13 (two degrees of 13edo), 3\13, 4\13, 5\13, &amp;amp; 6\13, respectively.&lt;br /&gt;
  Due to the prime character of the number 13, 13edo can form several xenharmonic &lt;a class="wiki_link" href="/MOSScales"&gt;moment of symmetry scales&lt;/a&gt;. The diagram below shows five &amp;quot;families&amp;quot; of MOS scales: those generated by making a chain of 2\13 (two degrees of 13edo), 3\13, 4\13, 5\13, &amp;amp; 6\13, respectively.&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
&lt;!-- ws:start:WikiTextLocalImageRule:345:&amp;lt;img src=&amp;quot;/file/view/13edo_horograms.jpg/104015789/13edo_horograms.jpg&amp;quot; alt=&amp;quot;&amp;quot; title=&amp;quot;&amp;quot; /&amp;gt; --&gt;&lt;img src="/file/view/13edo_horograms.jpg/104015789/13edo_horograms.jpg" alt="13edo_horograms.jpg" title="13edo_horograms.jpg" /&gt;&lt;!-- ws:end:WikiTextLocalImageRule:345 --&gt;&lt;br /&gt;
&lt;!-- ws:start:WikiTextLocalImageRule:375:&amp;lt;img src=&amp;quot;/file/view/13edo_horograms.jpg/104015789/13edo_horograms.jpg&amp;quot; alt=&amp;quot;&amp;quot; title=&amp;quot;&amp;quot; /&amp;gt; --&gt;&lt;img src="/file/view/13edo_horograms.jpg/104015789/13edo_horograms.jpg" alt="13edo_horograms.jpg" title="13edo_horograms.jpg" /&gt;&lt;!-- ws:end:WikiTextLocalImageRule:375 --&gt;&lt;br /&gt;
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~diagram by Andrew Heathwaite, based on horograms pioneered by Erv Wilson&lt;br /&gt;
~diagram by Andrew Heathwaite, based on horograms pioneered by Erv Wilson&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
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&lt;br /&gt;
&lt;br /&gt;
To facilitate discussion of these scales, Igliashon has ascribed them names based on H.P. Lovecraft's &amp;quot;Dream Cycle&amp;quot; mythos. The 2\13-based heptatonic has been named &amp;quot;archeotonic&amp;quot; after the &amp;quot;Old Ones&amp;quot; that rule the Dreamlands, and the 5\13-based octatonic has been named &amp;quot;oneirotonic&amp;quot; after the Dreamlands themselves. Modes of the archeotonic are named after the individual Old Ones themselves; modes of the oneirotonic are named after cities in the Dreamlands. See the charts of modes of the two scales below, excerpted from Igliashon's forthcoming paper &amp;quot;The Case for Thirteen&amp;quot;:&lt;br /&gt;
To facilitate discussion of these scales, Igliashon has ascribed them names based on H.P. Lovecraft's &amp;quot;Dream Cycle&amp;quot; mythos. The 2\13-based heptatonic has been named &amp;quot;archeotonic&amp;quot; after the &amp;quot;Old Ones&amp;quot; that rule the Dreamlands, and the 5\13-based octatonic has been named &amp;quot;oneirotonic&amp;quot; after the Dreamlands themselves. Modes of the archeotonic are named after the individual Old Ones themselves; modes of the oneirotonic are named after cities in the Dreamlands. See the charts of modes of the two scales below, excerpted from Igliashon's forthcoming paper &amp;quot;The Case for Thirteen&amp;quot;:&lt;br /&gt;
&lt;!-- ws:start:WikiTextLocalImageRule:346:&amp;lt;img src=&amp;quot;/file/view/Archeotonic.png/252639498/Archeotonic.png&amp;quot; alt=&amp;quot;&amp;quot; title=&amp;quot;&amp;quot; /&amp;gt; --&gt;&lt;img src="/file/view/Archeotonic.png/252639498/Archeotonic.png" alt="Archeotonic.png" title="Archeotonic.png" /&gt;&lt;!-- ws:end:WikiTextLocalImageRule:346 --&gt;&lt;br /&gt;
&lt;!-- ws:start:WikiTextLocalImageRule:376:&amp;lt;img src=&amp;quot;/file/view/Archeotonic.png/252639498/Archeotonic.png&amp;quot; alt=&amp;quot;&amp;quot; title=&amp;quot;&amp;quot; /&amp;gt; --&gt;&lt;img src="/file/view/Archeotonic.png/252639498/Archeotonic.png" alt="Archeotonic.png" title="Archeotonic.png" /&gt;&lt;!-- ws:end:WikiTextLocalImageRule:376 --&gt;&lt;br /&gt;
&lt;!-- ws:start:WikiTextLocalImageRule:347:&amp;lt;img src=&amp;quot;/file/view/Oneirotonic.png/252639860/Oneirotonic.png&amp;quot; alt=&amp;quot;&amp;quot; title=&amp;quot;&amp;quot; /&amp;gt; --&gt;&lt;img src="/file/view/Oneirotonic.png/252639860/Oneirotonic.png" alt="Oneirotonic.png" title="Oneirotonic.png" /&gt;&lt;!-- ws:end:WikiTextLocalImageRule:347 --&gt;&lt;br /&gt;
&lt;!-- ws:start:WikiTextLocalImageRule:377:&amp;lt;img src=&amp;quot;/file/view/Oneirotonic.png/252639860/Oneirotonic.png&amp;quot; alt=&amp;quot;&amp;quot; title=&amp;quot;&amp;quot; /&amp;gt; --&gt;&lt;img src="/file/view/Oneirotonic.png/252639860/Oneirotonic.png" alt="Oneirotonic.png" title="Oneirotonic.png" /&gt;&lt;!-- ws:end:WikiTextLocalImageRule:377 --&gt;&lt;br /&gt;
&lt;!-- ws:start:WikiTextHeadingRule:10:&amp;lt;h1&amp;gt; --&gt;&lt;h1 id="toc5"&gt;&lt;a name="Commas"&gt;&lt;/a&gt;&lt;!-- ws:end:WikiTextHeadingRule:10 --&gt;Commas&lt;/h1&gt;
&lt;!-- ws:start:WikiTextHeadingRule:10:&amp;lt;h1&amp;gt; --&gt;&lt;h1 id="toc5"&gt;&lt;a name="Commas"&gt;&lt;/a&gt;&lt;!-- ws:end:WikiTextHeadingRule:10 --&gt;Commas&lt;/h1&gt;
  13 EDO &lt;a class="wiki_link" href="/tempering%20out"&gt;tempers out&lt;/a&gt; the following &lt;a class="wiki_link" href="/comma"&gt;comma&lt;/a&gt;s. (Note: This assumes the val &amp;lt; 13 21 30 36 45 48 |.)&lt;br /&gt;
  13 EDO &lt;a class="wiki_link" href="/tempering%20out"&gt;tempers out&lt;/a&gt; the following &lt;a class="wiki_link" href="/comma"&gt;comma&lt;/a&gt;s. (Note: This assumes the val &amp;lt; 13 21 30 36 45 48 |.)&lt;br /&gt;