31/16: Difference between revisions

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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 = tricesimoprimal ultramajor seventh, tricesimoprimal semidiminished octave, octave-reduced 31st harmonic
: This revision was by author [[User:spt3125|spt3125]] and made on <tt>2014-06-10 22:09:46 UTC</tt>.<br>
| Color name = 31o7, thiwo 7th
: The original revision id was <tt>513548534</tt>.<br>
| Sound = jid_31_16_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>
<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">**31/16**
|-4 0 0 0 0 0 0 0 0 0 1&gt;
1145.0356 cents
[[media type="file" key="jid_31_16_pluck_adu_dr220.mp3"]] [[file:xenharmonic/jid_31_16_pluck_adu_dr220.mp3|sound sample]]


The 31st harmonic, octave-reduced.</pre></div>
In [[31-limit]] [[just intonation]], '''31/16''' is either the '''tricesimoprimal ultramajor seventh''' or '''tricesimoprimal semidiminished octave''', which is also the [[octave reduction|octave-reduced]] [[31/1|31st]] [[harmonic]]. It is sharp of the [[243/128|Pythagorean major seventh (243/128)]] by [[248/243]], and flat of the octave by [[32/31]].  
<h4>Original HTML 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;width:200%;white-space: pre-wrap ! important" class="old-revision-html">&lt;html&gt;&lt;head&gt;&lt;title&gt;31_16&lt;/title&gt;&lt;/head&gt;&lt;body&gt;&lt;strong&gt;31/16&lt;/strong&gt;&lt;br /&gt;
== Approximation ==
|-4 0 0 0 0 0 0 0 0 0 1&amp;gt;&lt;br /&gt;
31/16 is very well approximated by [[22edo]], with 21\22 being 0.4 [[Cent|¢]] sharp of 31/16.
1145.0356 cents&lt;br /&gt;
 
&lt;!-- ws:start:WikiTextMediaRule:0:&amp;lt;img src=&amp;quot;http://www.wikispaces.com/site/embedthumbnail/file-audio/jid_31_16_pluck_adu_dr220.mp3?h=20&amp;amp;w=240&amp;quot; class=&amp;quot;WikiMedia WikiMediaFile&amp;quot; id=&amp;quot;wikitext@@media@@type=&amp;amp;quot;file&amp;amp;quot; key=&amp;amp;quot;jid_31_16_pluck_adu_dr220.mp3&amp;amp;quot;&amp;quot; title=&amp;quot;Local Media File&amp;quot;height=&amp;quot;20&amp;quot; width=&amp;quot;240&amp;quot;/&amp;gt; --&gt;&lt;embed src="/s/mediaplayer.swf" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" quality="high" width="240" height="20" wmode="transparent" flashvars="file=http%253A%252F%252Fxenharmonic.wikispaces.com%252Ffile%252Fview%252Fjid_31_16_pluck_adu_dr220.mp3?file_extension=mp3&amp;autostart=false&amp;repeat=false&amp;showdigits=true&amp;showfsbutton=false&amp;width=240&amp;height=20"&gt;&lt;/embed&gt;&lt;!-- ws:end:WikiTextMediaRule:0 --&gt; &lt;a href="http://xenharmonic.wikispaces.com/file/view/jid_31_16_pluck_adu_dr220.mp3/513545544/jid_31_16_pluck_adu_dr220.mp3" onclick="ws.common.trackFileLink('http://xenharmonic.wikispaces.com/file/view/jid_31_16_pluck_adu_dr220.mp3/513545544/jid_31_16_pluck_adu_dr220.mp3');"&gt;sound sample&lt;/a&gt;&lt;br /&gt;
== See also ==
&lt;br /&gt;
* [[32/31]] – its [[octave complement]]
The 31st harmonic, octave-reduced.&lt;/body&gt;&lt;/html&gt;</pre></div>
* [[48/31]] – its [[twelfth complement]]
 
[[Category:Seventh]]
[[Category:Supermajor seventh]]
[[Category:Octave]]
[[Category:Suboctave]]

Latest revision as of 20:49, 24 September 2024

Interval information
Ratio 31/16
Subgroup monzo 2.31 [-4 1
Size in cents 1145.036¢
Names tricesimoprimal ultramajor seventh,
tricesimoprimal semidiminished octave,
octave-reduced 31st harmonic
Color name 31o7, thiwo 7th
FJS name [math]\displaystyle{ \text{M7}^{31} }[/math]
Special properties reduced,
reduced harmonic
Tenney height (log2 nd) 8.9542
Weil height (log2 max(n, d)) 9.90839
Wilson height (sopfr(nd)) 39

[sound info]
Open this interval in xen-calc

In 31-limit just intonation, 31/16 is either the tricesimoprimal ultramajor seventh or tricesimoprimal semidiminished octave, which is also the octave-reduced 31st harmonic. It is sharp of the Pythagorean major seventh (243/128) by 248/243, and flat of the octave by 32/31.

Approximation

31/16 is very well approximated by 22edo, with 21\22 being 0.4 ¢ sharp of 31/16.

See also