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