33/32

Revision as of 20:42, 30 June 2014 by Wikispaces>spt3125 (**Imported revision 515316274 - Original comment: **)

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This revision was by author spt3125 and made on 2014-06-30 20:42:38 UTC.
The original revision id was 515316274.
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Original Wikitext content:

**33/32**
|-5 1 0 0 1>
53.2729 cents
[[media type="file" key="jid_33_32_pluck_adu_dr220.mp3"]] [[file:xenharmonic/jid_33_32_pluck_adu_dr220.mp3|sound sample]]

The al-Farabi (Alpharabius) quarter-tone, 33/32, is a [[superparticular]] ratio which differs by a [[385_384|keenanisma]], 385/384, from the [[36_35|septimal quarter tone]] 36/35. Raising a just [[4_3|perfect fourth]] by the al-Farabi quarter-tone leads to the [[11_8|11/8]] super-fourth. Raising it instead by 36/35 leads to the [[48_35|septimal super-fourth]] which approximates 11/8.

Arguably the al-Farabia quarter-tone could have been used as a melodic interval in the Greek Enharmonic Genus. The resulting tetrachord would include 32:33:34 within the interval of a perfect fourth. This ancient Greek scale can be approximated in [[22edo|22-edo]] and [[24edo|24-edo]], if the comma 1089/1088 is tempered so that 33/32 and 34/33 are equated.

Original HTML content:

<html><head><title>33_32</title></head><body><strong>33/32</strong><br />
|-5 1 0 0 1&gt;<br />
53.2729 cents<br />
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<br />
The al-Farabi (Alpharabius) quarter-tone, 33/32, is a <a class="wiki_link" href="/superparticular">superparticular</a> ratio which differs by a <a class="wiki_link" href="/385_384">keenanisma</a>, 385/384, from the <a class="wiki_link" href="/36_35">septimal quarter tone</a> 36/35. Raising a just <a class="wiki_link" href="/4_3">perfect fourth</a> by the al-Farabi quarter-tone leads to the <a class="wiki_link" href="/11_8">11/8</a> super-fourth. Raising it instead by 36/35 leads to the <a class="wiki_link" href="/48_35">septimal super-fourth</a> which approximates 11/8.<br />
<br />
Arguably the al-Farabia quarter-tone could have been used as a melodic interval in the Greek Enharmonic Genus. The resulting tetrachord would include 32:33:34 within the interval of a perfect fourth. This ancient Greek scale can be approximated in <a class="wiki_link" href="/22edo">22-edo</a> and <a class="wiki_link" href="/24edo">24-edo</a>, if the comma 1089/1088 is tempered so that 33/32 and 34/33 are equated.</body></html>