Island chords
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- This revision was by author genewardsmith and made on 2014-06-06 11:10:16 UTC.
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Original Wikitext content:
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.
Original HTML content:
<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>