7/4: Difference between revisions
Wikispaces>xenwolf **Imported revision 231979670 - Original comment: sorry, I failed the right position ;)** |
Wikispaces>xenwolf **Imported revision 233284800 - Original comment: re-ordered after relative delta (in relative cents)** |
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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:xenwolf|xenwolf]] and made on <tt>2011-05- | : This revision was by author [[User:xenwolf|xenwolf]] and made on <tt>2011-05-31 17:24:11 UTC</tt>.<br> | ||
: The original revision id was <tt> | : The original revision id was <tt>233284800</tt>.<br> | ||
: The revision comment was: <tt> | : The revision comment was: <tt>re-ordered after relative delta (in relative cents)</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> | ||
<h4>Original Wikitext content:</h4> | <h4>Original Wikitext content:</h4> | ||
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=Approximations= | =Approximations= | ||
Edos containing good approximations of the interval 7:4 are: | Edos containing good approximations of the interval 7:4 are: | ||
||~ [[EDO]] ||~ abs Delta ||~ rel Delta ||~ Prominent Multiples || | |||
|| [[26edo]] || 0.40486 [[cent|ct]] || 0.87720 [[relative cent|rct]] || [[78edo]] || | |||
|| [[83edo]] || 0.15121 ct || 1.0459 rct || [[166edo]] || | |||
|| [[57edo]] || 0.40485 ct || 1.9231 rct || || | |||
|| [[31edo]] || 1.0839 ct || 2.8003 rct || || | |||
|| [[5edo]] || 8.8259 ct || 3.6775 rct || [[10edo]], [[15edo]], [[20edo]], [[25edo]] || | |||
|| [[21edo]] || 2.6026 ct || 4.5547 rct || || | |||
|| [[88edo]] || 0.6441 ct || 4.7233 rct || || | |||
|| [[47edo]] || 1.3868 ct || 5.4319 rct || [[94edo]] || | |||
|| [[73edo]] || 1.0371 ct || 6.3091 rct || || | |||
|| [[36edo]] || 2.1592 ct || 6.4777 rct || [[72edo]] || | |||
|| [[16edo]] || 6.1741 ct || 8.2321 rct || || | |||
|| [[11edo]] || 12.992 ct || 11.910 rct || [[22edo]] || | |||
|| [[89edo]] || 1.9606 ct || 14.541 rct || || | |||
|| [[69edo]] || 5.0871 ct || 29.251 rct || || | |||
</pre></div> | |||
<h4>Original HTML content:</h4> | <h4>Original HTML content:</h4> | ||
<div style="width:100%; max-height:400pt; overflow:auto; background-color:#f8f9fa; border: 1px solid #eaecf0; padding:0em"><pre style="margin:0px;border:none;background:none;word-wrap:break-word;width:200%;white-space: pre-wrap ! important" class="old-revision-html"><html><head><title>7_4</title></head><body>Frequency ratio 7:4, measuring approximately 968.8259064691249 cents, has been given the name &quot;harmonic seventh.&quot; It represents the interval between the 4th and 7th harmonics in the <a class="wiki_link" href="/OverToneSeries">overtone series</a>. It is also called a &quot;septimal subminor seventh&quot; -- the word &quot;septimal&quot; referring to the presence of a 7 as the highest prime in the ratio, and the word &quot;subminor&quot; referring to the harmonic seventh's narrowness compared with a traditional minor seventh (such as <a class="wiki_link" href="/9_5">9:5</a> or <a class="wiki_link" href="/16_9">16:9</a>, <a class="wiki_link" href="/12edo">12edo</a>'s 1000-cent interval, or a minor seventh found in a meantone system).<br /> | <div style="width:100%; max-height:400pt; overflow:auto; background-color:#f8f9fa; border: 1px solid #eaecf0; padding:0em"><pre style="margin:0px;border:none;background:none;word-wrap:break-word;width:200%;white-space: pre-wrap ! important" class="old-revision-html"><html><head><title>7_4</title></head><body>Frequency ratio 7:4, measuring approximately 968.8259064691249 cents, has been given the name &quot;harmonic seventh.&quot; It represents the interval between the 4th and 7th harmonics in the <a class="wiki_link" href="/OverToneSeries">overtone series</a>. It is also called a &quot;septimal subminor seventh&quot; -- the word &quot;septimal&quot; referring to the presence of a 7 as the highest prime in the ratio, and the word &quot;subminor&quot; referring to the harmonic seventh's narrowness compared with a traditional minor seventh (such as <a class="wiki_link" href="/9_5">9:5</a> or <a class="wiki_link" href="/16_9">16:9</a>, <a class="wiki_link" href="/12edo">12edo</a>'s 1000-cent interval, or a minor seventh found in a meantone system).<br /> | ||
| Line 86: | Line 88: | ||
<!-- ws:start:WikiTextHeadingRule:4:&lt;h1&gt; --><h1 id="toc2"><a name="Approximations"></a><!-- ws:end:WikiTextHeadingRule:4 -->Approximations</h1> | <!-- ws:start:WikiTextHeadingRule:4:&lt;h1&gt; --><h1 id="toc2"><a name="Approximations"></a><!-- ws:end:WikiTextHeadingRule:4 -->Approximations</h1> | ||
Edos containing good approximations of the interval 7:4 are:<br /> | Edos containing good approximations of the interval 7:4 are:<br /> | ||
< | <br /> | ||
<table class="wiki_table"> | |||
<tr> | |||
<th><a class="wiki_link" href="/EDO">EDO</a><br /> | |||
</th> | |||
<th>abs Delta<br /> | |||
</th> | |||
<th>rel Delta<br /> | |||
</th> | |||
<th>Prominent Multiples<br /> | |||
</th> | |||
</tr> | |||
<tr> | |||
<td><a class="wiki_link" href="/26edo">26edo</a><br /> | |||
</td> | |||
<td>0.40486 <a class="wiki_link" href="/cent">ct</a><br /> | |||
</td> | |||
<td>0.87720 <a class="wiki_link" href="/relative%20cent">rct</a><br /> | |||
</td> | |||
<td><a class="wiki_link" href="/78edo">78edo</a><br /> | |||
</td> | |||
</tr> | |||
<tr> | |||
<td><a class="wiki_link" href="/83edo">83edo</a><br /> | |||
</td> | |||
<td>0.15121 ct<br /> | |||
</td> | |||
<td>1.0459 rct<br /> | |||
</td> | |||
<td><a class="wiki_link" href="/166edo">166edo</a><br /> | |||
</td> | |||
</tr> | |||
<tr> | |||
<td><a class="wiki_link" href="/57edo">57edo</a><br /> | |||
</td> | |||
<td>0.40485 ct<br /> | |||
</td> | |||
<td>1.9231 rct<br /> | |||
</td> | |||
<td><br /> | |||
</td> | |||
</tr> | |||
<tr> | |||
<td><a class="wiki_link" href="/31edo">31edo</a><br /> | |||
</td> | |||
<td>1.0839 ct<br /> | |||
</td> | |||
<td>2.8003 rct<br /> | |||
</td> | |||
<td><br /> | |||
</td> | |||
</tr> | |||
<tr> | |||
<td><a class="wiki_link" href="/5edo">5edo</a><br /> | |||
</td> | |||
<td>8.8259 ct<br /> | |||
</td> | |||
<td>3.6775 rct<br /> | |||
</td> | |||
<td><a class="wiki_link" href="/10edo">10edo</a>, <a class="wiki_link" href="/15edo">15edo</a>, <a class="wiki_link" href="/20edo">20edo</a>, <a class="wiki_link" href="/25edo">25edo</a><br /> | |||
</td> | |||
</tr> | |||
<tr> | |||
<td><a class="wiki_link" href="/21edo">21edo</a><br /> | |||
</td> | |||
<td>2.6026 ct<br /> | |||
</td> | |||
<td>4.5547 rct<br /> | |||
</td> | |||
<td><br /> | |||
</td> | |||
</tr> | |||
<tr> | |||
<td><a class="wiki_link" href="/88edo">88edo</a><br /> | |||
</td> | |||
<td>0.6441 ct<br /> | |||
</td> | |||
<td>4.7233 rct<br /> | |||
</td> | |||
<td><br /> | |||
</td> | |||
</tr> | |||
<tr> | |||
<td><a class="wiki_link" href="/47edo">47edo</a><br /> | |||
</td> | |||
<td>1.3868 ct<br /> | |||
</td> | |||
<td>5.4319 rct<br /> | |||
</td> | |||
<td><a class="wiki_link" href="/94edo">94edo</a><br /> | |||
</td> | |||
</tr> | |||
<tr> | |||
<td><a class="wiki_link" href="/73edo">73edo</a><br /> | |||
</td> | |||
<td>1.0371 ct<br /> | |||
</td> | |||
<td>6.3091 rct<br /> | |||
</td> | |||
<td><br /> | |||
</td> | |||
</tr> | |||
<tr> | |||
<td><a class="wiki_link" href="/36edo">36edo</a><br /> | |||
</td> | |||
<td>2.1592 ct<br /> | |||
</td> | |||
<td>6.4777 rct<br /> | |||
</td> | |||
<td><a class="wiki_link" href="/72edo">72edo</a><br /> | |||
</td> | |||
</tr> | |||
<tr> | |||
<td><a class="wiki_link" href="/16edo">16edo</a><br /> | |||
</td> | |||
<td>6.1741 ct<br /> | |||
</td> | |||
<td>8.2321 rct<br /> | |||
</td> | |||
<td><br /> | |||
</td> | |||
</tr> | |||
<tr> | |||
<td><a class="wiki_link" href="/11edo">11edo</a><br /> | |||
</td> | |||
<td>12.992 ct<br /> | |||
</td> | |||
<td>11.910 rct<br /> | |||
</td> | |||
<td><a class="wiki_link" href="/22edo">22edo</a><br /> | |||
</td> | |||
</tr> | |||
<tr> | |||
<td><a class="wiki_link" href="/89edo">89edo</a><br /> | |||
</td> | |||
<td>1.9606 ct<br /> | |||
</td> | |||
<td>14.541 rct<br /> | |||
</td> | |||
<td><br /> | |||
</td> | |||
</tr> | |||
<tr> | |||
<td><a class="wiki_link" href="/69edo">69edo</a><br /> | |||
</td> | |||
<td>5.0871 ct<br /> | |||
</td> | |||
<td>29.251 rct<br /> | |||
</td> | |||
<td><br /> | |||
</td> | |||
</tr> | |||
</table> | |||
</body></html></pre></div> | |||