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| <h2>IMPORTED REVISION FROM WIKISPACES</h2>
| | {{Infobox Interval |
| This is an imported revision from Wikispaces. The revision metadata is included below for reference:<br>
| | | Name = 4th harmonic, double octave, perfect fifteenth, tetrave, quadruple |
| : This revision was by author [[User:spt3125|spt3125]] and made on <tt>2014-06-08 13:58:09 UTC</tt>.<br>
| | | Color name = wa 15th |
| : The original revision id was <tt>513248914</tt>.<br>
| | | Sound = jid_4_1_pluck_adu_dr110.mp3 |
| : 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>
| | {{Wikipedia| Fifteenth }} |
| <h4>Original Wikitext content:</h4>
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| <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;white-space: pre-wrap ! important" class="old-revision-html">**4/1**
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| 2400.0000 cents
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| [[media type="file" key="jid_4_1_pluck_adu_dr110.mp3"]] [[file:xenharmonic/jid_4_1_pluck_adu_dr110.mp3|sound sample]]
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| The 4th harmonic; two octaves ([[2_1|2/1]] * 2/1).</pre></div>
| | '''4/1''', the '''4th harmonic''', '''double octave''', '''perfect fifteenth''', '''tetrave''' or '''quadruple''', is the [[harmonic]] past [[3/1]] and before [[5/1]]. It is the first composite harmonic, equal to a stack of two [[octave]]s: ([[2/1]])<sup>2</sup>. |
| <h4>Original HTML content:</h4>
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| <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>4_1</title></head><body><strong>4/1</strong><br />
| | It can act as the [[interval of equivalence]] in temperaments that omit every other octave, such as [[meansquared]]. |
| |2&gt;<br />
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| 2400.0000 cents<br />
| | == See also == |
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| | * [[Ed4]] – equal divisions of the 4th harmonic |
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| The 4th harmonic; two octaves (<a class="wiki_link" href="/2_1">2/1</a> * 2/1).</body></html></pre></div>
| | [[Category:Taxicab-2 intervals]] |
4/1, the 4th harmonic, double octave, perfect fifteenth, tetrave or quadruple, is the harmonic past 3/1 and before 5/1. It is the first composite harmonic, equal to a stack of two octaves: (2/1)2.
It can act as the interval of equivalence in temperaments that omit every other octave, such as meansquared.
See also
- Ed4 – equal divisions of the 4th harmonic
