56/45: Difference between revisions

Wikispaces>genewardsmith
**Imported revision 300941366 - Original comment: **
Rework to reflect the progress thanks to the establishment of the aberschisma
 
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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 = septimal narrow major third, marvel-ptolemaic major third, aberschismic diminished fourth
: This revision was by author [[User:genewardsmith|genewardsmith]] and made on <tt>2012-02-12 12:38:45 UTC</tt>.<br>
| Color name = zg4, zogu 4th
: The original revision id was <tt>300941366</tt>.<br>
| Sound = jid_56_45_pluck_adu_dr220.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>
'''56/45''', conventionally known as the '''septimal narrow major third''' or '''marvel-ptolemaic major third''', is flat of the [[81/64|Pythagorean major third]] by [[3645/3584]], namely a [[81/80|syntonic comma]] plus a [[225/224|marvel comma]]. However, it functions more commonly as a diminished fourth, flat of the [[8192/6561|Pythagorean diminished fourth]] by an [[aberschisma]]. This gives rise to the more precise name '''aberschismic diminished fourth''', and in fact it arises as the interval between various [[9-odd-limit]] consonances – between [[5/4]] and [[14/9]], between [[9/7]] and [[8/5]], between [[9/8]] and [[7/5]], and between [[10/7]] and [[16/9]] – with it also being [[6/5]] away from the marvelous fifth, [[112/75]].  
<h4>Original Wikitext 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;white-space: pre-wrap ! important" class="old-revision-html">According to Ozan Yarman, the perde segah of Turkish maqam music should range from **56/45**, which is flatter than [[5_4|5/4]] by the [[septimal kleisma]] of [[225_224|225/224]], and 5/4. 56/45 is the interval between various 9-limit consonances: 5/4 and 14/9, 9/7 and 8/5, 9/8 and 7/5 and 10/7 and 16/9. [[Marvel]] tempering makes all of these intervals into major thirds like any other, and turns chords like
According to [[Ozan Yarman]], the perde segah of [[Arabic, Turkish, Persian music|Turkish maqam music]] should range from 56/45 to 5/4.
1-5/4-8/5 or 1-5/4-14/9 into [[Dyadic chord|essentially tempered dyadic chords]].</pre></div>
 
<h4>Original HTML content:</h4>
== Temperaments ==
<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">&lt;html&gt;&lt;head&gt;&lt;title&gt;56_45&lt;/title&gt;&lt;/head&gt;&lt;body&gt;According to Ozan Yarman, the perde segah of Turkish maqam music should range from &lt;strong&gt;56/45&lt;/strong&gt;, which is flatter than &lt;a class="wiki_link" href="/5_4"&gt;5/4&lt;/a&gt; by the &lt;a class="wiki_link" href="/septimal%20kleisma"&gt;septimal kleisma&lt;/a&gt; of &lt;a class="wiki_link" href="/225_224"&gt;225/224&lt;/a&gt;, and 5/4. 56/45 is the interval between various 9-limit consonances: 5/4 and 14/9, 9/7 and 8/5, 9/8 and 7/5 and 10/7 and 16/9. &lt;a class="wiki_link" href="/Marvel"&gt;Marvel&lt;/a&gt; tempering makes all of these intervals into major thirds like any other, and turns chords like &lt;br /&gt;
[[Marvel]] tempering equates this interval with the [[5/4|classical major third]] and turns chords like 1–5/4–8/5 or 1–5/4–14/9 into [[essentially tempered chord]]s.
1-5/4-8/5 or 1-5/4-14/9 into &lt;a class="wiki_link" href="/Dyadic%20chord"&gt;essentially tempered dyadic chords&lt;/a&gt;.&lt;/body&gt;&lt;/html&gt;</pre></div>
 
== Approximation ==
This interval is a third of a cent flatter than 6\19, the major third of [[19edo]].  
 
{{Interval edo approximation|56/45}}
 
== See also ==
* [[45/28]] – its [[octave complement]]
* [[135/112]] – its [[fifth complement]]
* [[Gallery of just intervals]]
 
[[Category:Third]]
[[Category:Major third]]
[[Category:Fourth]]
[[Category:Diminished fourth]]
[[Category:Aberschismic]]