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| <h2>IMPORTED REVISION FROM WIKISPACES</h2>
| | The '''island tetrad''' is an [[Dyadic_chord#Essentially tempered dyadic chords|essentially tempered dyadic chord]] which under [[octave_reduction|octave reduction]] consists of three [[15/13|15/13]] intervals followed by a [[13/10|13/10]], which closes on the octave since the [[island_comma|island comma]], [[676/675|676/675]], is [[tempering_out|tempered out]]; in other words a 15/13-15/13-15/13-13/10 chord. It can also be viewed as an island tempered version of 1-15/13-[[4/3|4/3]]-[[20/13|20/13]]. Contained within it are a [[barbados_triad|barbados triad]], the 1-13/10-[[3/2|3/2]] chord, and an [[island_triad|island triad]], the 1-15/13-4/3 chord, which in another position is the 1-3/2-[[26/15|26/15]] chord. Another island chord of interest is a 26/15 over a major triad, 1-5/4-3/2-26/15, 5/4-6/5-15/13-15/13 in terms of intervals. |
| This is an imported revision from Wikispaces. The revision metadata is included below for reference:<br>
| | [[Category:15-limit]] |
| : This revision was by author [[User:genewardsmith|genewardsmith]] and made on <tt>2014-06-06 11:10:16 UTC</tt>.<br>
| | [[Category:chord]] |
| : The original revision id was <tt>513103752</tt>.<br>
| | [[Category:dyadic]] |
| : The revision comment was: <tt></tt><br>
| | [[Category:island]] |
| The revision contents are below, presented both in the original Wikispaces Wikitext format, and in HTML exactly as Wikispaces rendered it.<br>
| | [[Category:tetrad]] |
| <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">The **island tetrad** is an [[Dyadic chord#Essentially tempered dyadic chords|essentially tempered dyadic chord]] which under [[octave reduction]] consists of three [[15_13|15/13]] intervals followed by a [[13_10|13/10]], which closes on the octave since the [[island comma]], [[676_675|676/675]], is [[tempering out|tempered out]]; in other words a 15/13-15/13-15/13-13/10 chord. It can also be viewed as an island tempered version of 1-15/13-[[4_3|4/3]]-[[20_13|20/13]]. Contained within it are a [[barbados triad]], the 1-13/10-[[3_2|3/2]] chord, and an [[island triad]], the 1-15/13-4/3 chord, which in another position is the 1-3/2-[[26_15|26/15]] chord. Another island chord of interest is a 26/15 over a major triad, 1-5/4-3/2-26/15, 5/4-6/5-15/13-15/13 in terms of intervals.</pre></div>
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| <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>island tetrad</title></head><body>The <strong>island tetrad</strong> is an <a class="wiki_link" href="/Dyadic%20chord#Essentially tempered dyadic chords">essentially tempered dyadic chord</a> which under <a class="wiki_link" href="/octave%20reduction">octave reduction</a> consists of three <a class="wiki_link" href="/15_13">15/13</a> intervals followed by a <a class="wiki_link" href="/13_10">13/10</a>, which closes on the octave since the <a class="wiki_link" href="/island%20comma">island comma</a>, <a class="wiki_link" href="/676_675">676/675</a>, is <a class="wiki_link" href="/tempering%20out">tempered out</a>; in other words a 15/13-15/13-15/13-13/10 chord. It can also be viewed as an island tempered version of 1-15/13-<a class="wiki_link" href="/4_3">4/3</a>-<a class="wiki_link" href="/20_13">20/13</a>. Contained within it are a <a class="wiki_link" href="/barbados%20triad">barbados triad</a>, the 1-13/10-<a class="wiki_link" href="/3_2">3/2</a> chord, and an <a class="wiki_link" href="/island%20triad">island triad</a>, the 1-15/13-4/3 chord, which in another position is the 1-3/2-<a class="wiki_link" href="/26_15">26/15</a> chord. Another island chord of interest is a 26/15 over a major triad, 1-5/4-3/2-26/15, 5/4-6/5-15/13-15/13 in terms of intervals.</body></html></pre></div>
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The island tetrad is an essentially tempered dyadic chord which under octave reduction consists of three 15/13 intervals followed by a 13/10, which closes on the octave since the island comma, 676/675, is tempered out; in other words a 15/13-15/13-15/13-13/10 chord. It can also be viewed as an island tempered version of 1-15/13-4/3-20/13. Contained within it are a barbados triad, the 1-13/10-3/2 chord, and an island triad, the 1-15/13-4/3 chord, which in another position is the 1-3/2-26/15 chord. Another island chord of interest is a 26/15 over a major triad, 1-5/4-3/2-26/15, 5/4-6/5-15/13-15/13 in terms of intervals.