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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 = ptolemaic chromatic semitone, major limma, major chroma, mavila comma |
| : This revision was by author [[User:xenwolf|xenwolf]] and made on <tt>2011-08-21 12:01:22 UTC</tt>.<br>
| | | Color name = Ly1, layo unison,<br>Layobi comma |
| : The original revision id was <tt>247391789</tt>.<br>
| | | Sound = jid_135_128_pluck_adu_dr220.mp3 |
| : The revision comment was: <tt></tt><br>
| | | Comma = yes |
| The revision contents are below, presented both in the original Wikispaces Wikitext format, and in HTML exactly as Wikispaces rendered it.<br>
| | }} |
| <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 interval with the [[Gallery of Just Intervals|frequency ratio]] **135/128** ([[monzo]]: |-7 3 1>), 92.179 [[cent]]s in size, is called //[[pelogic comma]]// or //[[major chroma]]//.
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| As a [[comma]] it represents the difference between three [[4_3|perfect fourths]] and a [[5_4|just major third]] (plus an [[Octave|octave]]).</pre></div>
| | The [[5-limit]] interval '''135/128''', about 92.2 [[cent]]s in size, is called the '''ptolemaic chromatic semitone''', the '''major limma''' or the '''major chroma'''. It is a [[syntonic comma]] away from the Pythagorean chromatic semitone [[2187/2048]], and so is tuned justly in [[1/7-comma meantone]]. Flattening by another syntonic comma reaches the even simpler [[25/24]]. In regular 5-limit diatonic systems, it is the chromatic semitone that compliments [[16/15]], as the two semitones add up to [[9/8]]. |
| <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>135_128</title></head><body>The interval with the <a class="wiki_link" href="/Gallery%20of%20Just%20Intervals">frequency ratio</a> <strong>135/128</strong> (<a class="wiki_link" href="/monzo">monzo</a>: |-7 3 1&gt;), 92.179 <a class="wiki_link" href="/cent">cent</a>s in size, is called <em><a class="wiki_link" href="/pelogic%20comma">pelogic comma</a></em> or <em><a class="wiki_link" href="/major%20chroma">major chroma</a></em>.<br />
| | == Temperaments == |
| <br />
| | If 135/128 is treated as a comma to be [[tempering out|tempered out]], it may be called the '''mavila comma'''. It represents the difference between three [[4/3|perfect fourth]]s and a [[5/4|just major third]] (plus an [[octave]]). Tempering it out results in the [[mavila]] temperament. |
| As a <a class="wiki_link" href="/comma">comma</a> it represents the difference between three <a class="wiki_link" href="/4_3">perfect fourths</a> and a <a class="wiki_link" href="/5_4">just major third</a> (plus an <a class="wiki_link" href="/Octave">octave</a>).</body></html></pre></div>
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| | 135/128 is very close to one step of [[13edo]], in fact being a {{w|Continued fraction|semiconvergent}}. [[Aluminium]] temperament realizes this through a regular temperament lens. |
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| | == See also == |
| | * [[256/135]] – its [[octave complement]] |
| | * [[Aluminium comma]] - the difference between a stack of 13 instances of this interval and [[2/1]] |
| | * [[Gallery of just intervals]] |
| | * [[Medium comma]] |
| | * [[:File:Ji-135-128-csound-foscil-220hz.mp3]] – another sound example |
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| | [[Category:Semitone]] |
| | [[Category:Chroma]] |
| | [[Category:Mavila]] |
| | [[Category:Meantone]] |
| | [[Category:Commas named after musical traditions]] |