Bill Sethares: Difference between revisions

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<h2>IMPORTED REVISION FROM WIKISPACES</h2>

This is an imported revision from Wikispaces. The revision metadata is included below for reference:<br>

: This revision was by author [[User:Omegatron|Omegatron]] and made on <tt>2014-09-08 10:08:33 UTC</tt>.<br>

: This revision was by author [[User:Omegatron|Omegatron]] and made on <tt>2014-09-08 10:19:00 UTC</tt>.<br>

: The original revision id was <tt>~~521254618~~</tt>.<br>

: The original revision id was <tt>521257052</tt>.<br>

: 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>

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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">**William A. Sethares** (born April 19, 1955) is an American music theorist and EE professor with extensive contributions to music theory. He is noted for work adjusting tuning and timbre based on the Plomp and Levelt approach to consonance, and work with [[Andrew Milne]] and [[Jim Plamondon]] on [[ismorphic keyboards|isomorphic keyboards]], which have the same fingering in all keys and which can be seen as a generalization of the work of Bosanquet.

[[http://sethares.engr.wisc.edu/comprog.html|His dissonance measure]] is based on summing the Plomp-Levelt roughness for every pair of tones in a sound, which produces smooth dissonance curves for dyads of harmonic sounds that are similar to other measures. However, it measures major chords (4:5:6) and minor chords (10:12:15) as equally dissonant, which is not the usual interpretation. [[Paul Erlich]] [[http://www.tonalsoft.com/sonic-arts/td/erlich/entropy.htm|calls this measurement "roughness"]] , and combines it with "tonalness" (similarity to a harmonic series) to explain the discrepancy.

[[http://sethares.engr.wisc.edu/comprog.html|His dissonance measure]] is based on summing the Plomp-Levelt roughness for every pair of tones in a sound, which produces smooth dissonance curves for dyads of harmonic sounds that are similar to other measures:

[[image:http://sethares.engr.wisc.edu/images/image1.gif]]

He then uses this to derive scales for timbres with non-harmonic spectra, which are said to match those actually in use by gamelans, etc.

However, when applied to more than 2 tones, it measures major chords (4:5:6) and minor chords (10:12:15) as equally dissonant, which is not the usual interpretation. [[Paul Erlich]] [[http://www.tonalsoft.com/sonic-arts/td/erlich/entropy.htm|calls this measurement "roughness"]] , and combines it with "tonalness" (similarity to a harmonic series) to explain the discrepancy.

[[http://en.wikipedia.org/wiki/William_Sethares|Wikipedia article]]

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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>Bill Sethares</title></head><body><strong>William A. Sethares</strong> (born April 19, 1955) is an American music theorist and EE professor with extensive contributions to music theory. He is noted for work adjusting tuning and timbre based on the Plomp and Levelt approach to consonance, and work with <a class="wiki_link" href="/Andrew%20Milne">Andrew Milne</a> and <a class="wiki_link" href="/Jim%20Plamondon">Jim Plamondon</a> on <a class="wiki_link" href="/ismorphic%20keyboards">isomorphic keyboards</a>, which have the same fingering in all keys and which can be seen as a generalization of the work of Bosanquet.<br />

<br />

<a class="wiki_link_ext" href="http://sethares.engr.wisc.edu/comprog.html" rel="nofollow">His dissonance measure</a> is based on summing the Plomp-Levelt roughness for every pair of tones in a sound, which produces smooth dissonance curves for dyads of harmonic sounds that are similar to other measures. However, it measures major chords (4:5:6) and minor chords (10:12:15) as equally dissonant, which is not the usual interpretation. <a class="wiki_link" href="/Paul%20Erlich">Paul Erlich</a> <a class="wiki_link_ext" href="http://www.tonalsoft.com/sonic-arts/td/erlich/entropy.htm" rel="nofollow">calls this measurement &quot;roughness&quot;</a> , and combines it with &quot;tonalness&quot; (similarity to a harmonic series) to explain the discrepancy.<br />

<a class="wiki_link_ext" href="http://sethares.engr.wisc.edu/comprog.html" rel="nofollow">His dissonance measure</a> is based on summing the Plomp-Levelt roughness for every pair of tones in a sound, which produces smooth dissonance curves for dyads of harmonic sounds that are similar to other measures:<br />

<br />

<img src="http://sethares.engr.wisc.edu/images/image1.gif" alt="external image image1.gif" title="external image image1.gif" /><br />

<br />

He then uses this to derive scales for timbres with non-harmonic spectra, which are said to match those actually in use by gamelans, etc.<br />

<br />

However, when applied to more than 2 tones, it measures major chords (4:5:6) and minor chords (10:12:15) as equally dissonant, which is not the usual interpretation. <a class="wiki_link" href="/Paul%20Erlich">Paul Erlich</a> <a class="wiki_link_ext" href="http://www.tonalsoft.com/sonic-arts/td/erlich/entropy.htm" rel="nofollow">calls this measurement &quot;roughness&quot;</a> , and combines it with &quot;tonalness&quot; (similarity to a harmonic series) to explain the discrepancy.<br />

<br />

<a class="wiki_link_ext" href="http://en.wikipedia.org/wiki/William_Sethares" rel="nofollow">Wikipedia article</a><br />

<a class="wiki_link_ext" href="http://sethares.engr.wisc.edu" rel="nofollow">Homepage</a></body></html></pre></div>

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 <h2>IMPORTED REVISION FROM WIKISPACES</h2>
 This is an imported revision from Wikispaces. The revision metadata is included below for reference:<br>
-: This revision was by author [[User:Omegatron|Omegatron]] and made on <tt>2014-09-08 10:08:33 UTC</tt>.<br>
+: This revision was by author [[User:Omegatron|Omegatron]] and made on <tt>2014-09-08 10:19:00 UTC</tt>.<br>
-: The original revision id was <tt>521254618</tt>.<br>
+: The original revision id was <tt>521257052</tt>.<br>
 : 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>
@@ Line 8: / Line 8: @@
 <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">**William A. Sethares** (born April 19, 1955) is an American music theorist and EE professor with extensive contributions to music theory. He is noted for work adjusting tuning and timbre based on the Plomp and Levelt approach to consonance, and work with [[Andrew Milne]] and [[Jim Plamondon]] on [[ismorphic keyboards|isomorphic keyboards]], which have the same fingering in all keys and which can be seen as a generalization of the work of Bosanquet.
-[[http://sethares.engr.wisc.edu/comprog.html|His dissonance measure]] is based on summing the Plomp-Levelt roughness for every pair of tones in a sound, which produces smooth dissonance curves for dyads of harmonic sounds that are similar to other measures.  However, it measures major chords (4:5:6) and minor chords (10:12:15) as equally dissonant, which is not the usual interpretation.  [[Paul Erlich]] [[http://www.tonalsoft.com/sonic-arts/td/erlich/entropy.htm|calls this measurement "roughness"]] , and combines it with "tonalness" (similarity to a harmonic series) to explain the discrepancy.
+[[http://sethares.engr.wisc.edu/comprog.html|His dissonance measure]] is based on summing the Plomp-Levelt roughness for every pair of tones in a sound, which produces smooth dissonance curves for dyads of harmonic sounds that are similar to other measures:
+[[image:http://sethares.engr.wisc.edu/images/image1.gif]]
+He then uses this to derive scales for timbres with non-harmonic spectra, which are said to match those actually in use by gamelans, etc.
+However, when applied to more than 2 tones, it measures major chords (4:5:6) and minor chords (10:12:15) as equally dissonant, which is not the usual interpretation.  [[Paul Erlich]] [[http://www.tonalsoft.com/sonic-arts/td/erlich/entropy.htm|calls this measurement "roughness"]] , and combines it with "tonalness" (similarity to a harmonic series) to explain the discrepancy.
 [[http://en.wikipedia.org/wiki/William_Sethares|Wikipedia article]]
@@ Line 15: / Line 21: @@
 <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;Bill Sethares&lt;/title&gt;&lt;/head&gt;&lt;body&gt;&lt;strong&gt;William A. Sethares&lt;/strong&gt; (born April 19, 1955) is an American music theorist and EE professor with extensive contributions to music theory. He is noted for work adjusting tuning and timbre based on the Plomp and Levelt approach to consonance, and work with &lt;a class="wiki_link" href="/Andrew%20Milne"&gt;Andrew Milne&lt;/a&gt; and &lt;a class="wiki_link" href="/Jim%20Plamondon"&gt;Jim Plamondon&lt;/a&gt; on &lt;a class="wiki_link" href="/ismorphic%20keyboards"&gt;isomorphic keyboards&lt;/a&gt;, which have the same fingering in all keys and which can be seen as a generalization of the work of Bosanquet.&lt;br /&gt;
 &lt;br /&gt;
-&lt;a class="wiki_link_ext" href="http://sethares.engr.wisc.edu/comprog.html" rel="nofollow"&gt;His dissonance measure&lt;/a&gt; is based on summing the Plomp-Levelt roughness for every pair of tones in a sound, which produces smooth dissonance curves for dyads of harmonic sounds that are similar to other measures.  However, it measures major chords (4:5:6) and minor chords (10:12:15) as equally dissonant, which is not the usual interpretation.  &lt;a class="wiki_link" href="/Paul%20Erlich"&gt;Paul Erlich&lt;/a&gt; &lt;a class="wiki_link_ext" href="http://www.tonalsoft.com/sonic-arts/td/erlich/entropy.htm" rel="nofollow"&gt;calls this measurement &amp;quot;roughness&amp;quot;&lt;/a&gt; , and combines it with &amp;quot;tonalness&amp;quot; (similarity to a harmonic series) to explain the discrepancy.&lt;br /&gt;
+&lt;a class="wiki_link_ext" href="http://sethares.engr.wisc.edu/comprog.html" rel="nofollow"&gt;His dissonance measure&lt;/a&gt; is based on summing the Plomp-Levelt roughness for every pair of tones in a sound, which produces smooth dissonance curves for dyads of harmonic sounds that are similar to other measures:&lt;br /&gt;
+&lt;br /&gt;
+&lt;!-- ws:start:WikiTextRemoteImageRule:0:&amp;lt;img src=&amp;quot;http://sethares.engr.wisc.edu/images/image1.gif&amp;quot; alt=&amp;quot;&amp;quot; title=&amp;quot;&amp;quot; /&amp;gt; --&gt;&lt;img src="http://sethares.engr.wisc.edu/images/image1.gif" alt="external image image1.gif" title="external image image1.gif" /&gt;&lt;!-- ws:end:WikiTextRemoteImageRule:0 --&gt;&lt;br /&gt;
+&lt;br /&gt;
+He then uses this to derive scales for timbres with non-harmonic spectra, which are said to match those actually in use by gamelans, etc.&lt;br /&gt;
+&lt;br /&gt;
+However, when applied to more than 2 tones, it measures major chords (4:5:6) and minor chords (10:12:15) as equally dissonant, which is not the usual interpretation.  &lt;a class="wiki_link" href="/Paul%20Erlich"&gt;Paul Erlich&lt;/a&gt; &lt;a class="wiki_link_ext" href="http://www.tonalsoft.com/sonic-arts/td/erlich/entropy.htm" rel="nofollow"&gt;calls this measurement &amp;quot;roughness&amp;quot;&lt;/a&gt; , and combines it with &amp;quot;tonalness&amp;quot; (similarity to a harmonic series) to explain the discrepancy.&lt;br /&gt;
 &lt;br /&gt;
 &lt;a class="wiki_link_ext" href="http://en.wikipedia.org/wiki/William_Sethares" rel="nofollow"&gt;Wikipedia article&lt;/a&gt;&lt;br /&gt;
 &lt;a class="wiki_link_ext" href="http://sethares.engr.wisc.edu" rel="nofollow"&gt;Homepage&lt;/a&gt;&lt;/body&gt;&lt;/html&gt;</pre></div>