23edo: 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:

: This revision was by author [[User:~~JosephRuhf~~|~~JosephRuhf~~]] and made on <tt>2016-10-~~31 09~~:19:52 UTC</tt>.

: This revision was by author [[User:TallKite|TallKite]] and made on <tt>2016-11-21 05:50:01 UTC</tt>.

: The original revision id was <tt>~~597549152~~</tt>.

: The original revision id was <tt>599953430</tt>.

: The revision comment was: <tt></tt>

The revision contents are below, presented both in the original Wikispaces Wikitext format, and in HTML exactly as Wikispaces rendered it.

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However, one can also map 3/2 to 14 degrees of 23-EDO without significantly increasing the error, taking us to a [[7-limit]] temperament where two 'broad 3/2's equals 7/3, meaning 28/27 is tempered out, and six 4/3's octave-reduced equals 5/4, meaning 4096/3645 is tempered out. Both of these are very large commas, so this is not at all an accurate temperament, but it is related to [[13edo|13-EDO]] and [[18edo|18-EDO]] and produces [[MOSScales|MOS scales]] of 5 and 8 notes: 5 5 4 5 4 (the [[3L 2s|"anti-pentatonic"]]) and 4 1 4 1 4 4 1 4 (the "quarter-tone" version of the Blackwood/[[http://en.wikipedia.org/wiki/Paul_Rapoport_%28music_critic%29|Rapoport]]/Wilson 13-EDO "subminor" scale). Alternatively we can treat this temperament as a 2.9.21 subgroup, and instead of calling 9 degrees of 23-EDO a Sub-"4/3", we can call it 21/16. Here three 21/16's gets us to 9/4, meaning 1029/1024 is tempered out. This allows us to treat a triad of 0-4-9 degrees of 23-EDO as an approximation to 16:18:21, and 0-5-9 as 1/(16:18:21); both of these triads are abundant in the 8-note MOS scale.

Like 16edo, 23edo can be notated two ways. The first is with sharp higher than flat, to preserve melodic contour:

D * * E * * * F * * G * * A * * B * * * C * * D

D - D# - Eb - E - E# - Ex/Fbb - Fb - F - F# - Gb - G - G# - Ab - A - A# - Bb - B - B# - Bx/Cbb - Cb - C - C# - Db - D

P1 - A1 - d2 - m2 - M2 - A2/d3 - m3 - M3 - A3 - d4 - P4 - A4 - d5 - P5 - A5 - d6 - m6 - M6 - A6/d7 - m7 - M7 - A7 - d8 - P8

The second way is with sharp lower than flat, to preserve interval arithmetic and chord names:

D * * E * * * F * * G * * A * * B * * * C * * D

D - Db - E# - E - Eb - Ebb/Fx - F# - F - Fb - G# - G - Gb - A# - A - Ab - B# - B - Bb - Bbb/Cx - C# - C - Cb - D# - D

P1 - d1 - A2 - M2 - m2 - d2/A3 - M3 - m3 - d3 - A4 - P4 - d4 - A5 - P5 - d5 - A6 - M6 - m6 - d6/A7 - M7 - m7 - d7 - A8 - P8

==Kosmorsky's Sephiroth modes==

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However, one can also map 3/2 to 14 degrees of 23-EDO without significantly increasing the error, taking us to a <a class="wiki_link" href="/7-limit">7-limit</a> temperament where two 'broad 3/2's equals 7/3, meaning 28/27 is tempered out, and six 4/3's octave-reduced equals 5/4, meaning 4096/3645 is tempered out. Both of these are very large commas, so this is not at all an accurate temperament, but it is related to <a class="wiki_link" href="/13edo">13-EDO</a> and <a class="wiki_link" href="/18edo">18-EDO</a> and produces <a class="wiki_link" href="/MOSScales">MOS scales</a> of 5 and 8 notes: 5 5 4 5 4 (the <a class="wiki_link" href="/3L%202s">&quot;anti-pentatonic&quot;</a>) and 4 1 4 1 4 4 1 4 (the &quot;quarter-tone&quot; version of the Blackwood/<a class="wiki_link_ext" href="http://en.wikipedia.org/wiki/Paul_Rapoport_%28music_critic%29" rel="nofollow">Rapoport</a>/Wilson 13-EDO &quot;subminor&quot; scale). Alternatively we can treat this temperament as a 2.9.21 subgroup, and instead of calling 9 degrees of 23-EDO a Sub-&quot;4/3&quot;, we can call it 21/16. Here three 21/16's gets us to 9/4, meaning 1029/1024 is tempered out. This allows us to treat a triad of 0-4-9 degrees of 23-EDO as an approximation to 16:18:21, and 0-5-9 as 1/(16:18:21); both of these triads are abundant in the 8-note MOS scale.

Like 16edo, 23edo can be notated two ways. The first is with sharp higher than flat, to preserve melodic contour:

D * * E * * * F * * G * * A * * B * * * C * * D

D - D# - Eb - E - E# - Ex/Fbb - Fb - F - F# - Gb - G - G# - Ab - A - A# - Bb - B - B# - Bx/Cbb - Cb - C - C# - Db - D

P1 - A1 - d2 - m2 - M2 - A2/d3 - m3 - M3 - A3 - d4 - P4 - A4 - d5 - P5 - A5 - d6 - m6 - M6 - A6/d7 - m7 - M7 - A7 - d8 - P8

The second way is with sharp lower than flat, to preserve interval arithmetic and chord names:

D * * E * * * F * * G * * A * * B * * * C * * D

D - Db - E# - E - Eb - Ebb/Fx - F# - F - Fb - G# - G - Gb - A# - A - Ab - B# - B - Bb - Bbb/Cx - C# - C - Cb - D# - D

P1 - d1 - A2 - M2 - m2 - d2/A3 - M3 - m3 - d3 - A4 - P4 - d4 - A5 - P5 - d5 - A6 - M6 - m6 - d6/A7 - M7 - m7 - d7 - A8 - P8

<h2 id="toc2"><a name="x23 tone equal temperament-Kosmorsky's Sephiroth modes"></a>Kosmorsky's Sephiroth modes</h2>

@@ Line 1: / Line 1: @@
 <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:JosephRuhf|JosephRuhf]] and made on <tt>2016-10-31 09:19:52 UTC</tt>.<br>
+: This revision was by author [[User:TallKite|TallKite]] and made on <tt>2016-11-21 05:50:01 UTC</tt>.<br>
-: The original revision id was <tt>597549152</tt>.<br>
+: The original revision id was <tt>599953430</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 85: / Line 85: @@
 However, one can also map 3/2 to 14 degrees of 23-EDO without significantly increasing the error, taking us to a [[7-limit]] temperament where two 'broad 3/2's equals 7/3, meaning 28/27 is tempered out, and six 4/3's octave-reduced equals 5/4, meaning 4096/3645 is tempered out. Both of these are very large commas, so this is not at all an accurate temperament, but it is related to [[13edo|13-EDO]] and [[18edo|18-EDO]] and produces [[MOSScales|MOS scales]] of 5 and 8 notes: 5 5 4 5 4 (the [[3L 2s|"anti-pentatonic"]]) and 4 1 4 1 4 4 1 4 (the "quarter-tone" version of the Blackwood/[[http://en.wikipedia.org/wiki/Paul_Rapoport_%28music_critic%29|Rapoport]]/Wilson 13-EDO "subminor" scale). Alternatively we can treat this temperament as a 2.9.21 subgroup, and instead of calling 9 degrees of 23-EDO a Sub-"4/3", we can call it 21/16. Here three 21/16's gets us to 9/4, meaning 1029/1024 is tempered out. This allows us to treat a triad of 0-4-9 degrees of 23-EDO as an approximation to 16:18:21, and 0-5-9 as 1/(16:18:21); both of these triads are abundant in the 8-note MOS scale.
+Like 16edo, 23edo can be notated two ways. The first is with sharp higher than flat, to preserve melodic contour:
+D * * E * * * F * * G * * A * * B * * * C * * D
+D - D# - Eb - E - E# - Ex/Fbb - Fb - F - F# - Gb - G - G# - Ab - A - A# - Bb - B - B# - Bx/Cbb - Cb - C - C# - Db - D
+P1 - A1 - d2 - m2 - M2 - A2/d3 - m3 - M3 - A3 - d4 - P4 - A4 - d5 - P5 - A5 - d6 - m6 - M6 - A6/d7 - m7 - M7 - A7 - d8 - P8
+The second way is with sharp lower than flat, to preserve interval arithmetic and chord names:
+D * * E * * * F * * G * * A * * B * * * C * * D
+D - Db - E# - E - Eb - Ebb/Fx - F# - F - Fb - G# - G - Gb - A# - A - Ab - B# - B - Bb - Bbb/Cx - C# - C - Cb - D# - D
+P1 - d1 - A2 - M2 - m2 - d2/A3 - M3 - m3 - d3 - A4 - P4 - d4 - A5 - P5 - d5 - A6 - M6 - m6 - d6/A7 - M7 - m7 - d7 - A8 - P8
 ==Kosmorsky's Sephiroth modes==
@@ Line 585: / Line 596: @@
 &lt;br /&gt;
 However, one can also map 3/2 to 14 degrees of 23-EDO without significantly increasing the error, taking us to a &lt;a class="wiki_link" href="/7-limit"&gt;7-limit&lt;/a&gt; temperament where two 'broad 3/2's equals 7/3, meaning 28/27 is tempered out, and six 4/3's octave-reduced equals 5/4, meaning 4096/3645 is tempered out. Both of these are very large commas, so this is not at all an accurate temperament, but it is related to &lt;a class="wiki_link" href="/13edo"&gt;13-EDO&lt;/a&gt; and &lt;a class="wiki_link" href="/18edo"&gt;18-EDO&lt;/a&gt; and produces &lt;a class="wiki_link" href="/MOSScales"&gt;MOS scales&lt;/a&gt; of 5 and 8 notes: 5 5 4 5 4 (the &lt;a class="wiki_link" href="/3L%202s"&gt;&amp;quot;anti-pentatonic&amp;quot;&lt;/a&gt;) and 4 1 4 1 4 4 1 4 (the &amp;quot;quarter-tone&amp;quot; version of the Blackwood/&lt;a class="wiki_link_ext" href="http://en.wikipedia.org/wiki/Paul_Rapoport_%28music_critic%29" rel="nofollow"&gt;Rapoport&lt;/a&gt;/Wilson 13-EDO &amp;quot;subminor&amp;quot; scale). Alternatively we can treat this temperament as a 2.9.21 subgroup, and instead of calling 9 degrees of 23-EDO a Sub-&amp;quot;4/3&amp;quot;, we can call it 21/16. Here three 21/16's gets us to 9/4, meaning 1029/1024 is tempered out. This allows us to treat a triad of 0-4-9 degrees of 23-EDO as an approximation to 16:18:21, and 0-5-9 as 1/(16:18:21); both of these triads are abundant in the 8-note MOS scale.&lt;br /&gt;
+&lt;br /&gt;
+Like 16edo, 23edo can be notated two ways. The first is with sharp higher than flat, to preserve melodic contour:&lt;br /&gt;
+D * * E * * * F * * G * * A * * B * * * C * * D&lt;br /&gt;
+D - D# - Eb - E - E# - Ex/Fbb - Fb - F - F# - Gb - G - G# - Ab - A - A# - Bb - B - B# - Bx/Cbb - Cb - C - C# - Db - D&lt;br /&gt;
+P1 - A1 - d2 - m2 - M2 - A2/d3 - m3 - M3 - A3 - d4 - P4 - A4 - d5 - P5 - A5 - d6 - m6 - M6 - A6/d7 - m7 - M7 - A7 - d8 - P8&lt;br /&gt;
+&lt;br /&gt;
+The second way is with sharp lower than flat, to preserve interval arithmetic and chord names:&lt;br /&gt;
+D * * E * * * F * * G * * A * * B * * * C * * D&lt;br /&gt;
+D - Db - E# - E - Eb - Ebb/Fx - F# - F - Fb - G# - G - Gb - A# - A - Ab - B# - B - Bb - Bbb/Cx - C# - C - Cb - D# - D&lt;br /&gt;
+P1 - d1 - A2 - M2 - m2 - d2/A3 - M3 - m3 - d3 - A4 - P4 - d4 - A5 - P5 - d5 - A6 - M6 - m6 - d6/A7 - M7 - m7 - d7 - A8 - P8&lt;br /&gt;
+&lt;br /&gt;
 &lt;br /&gt;
 &lt;!-- ws:start:WikiTextHeadingRule:6:&amp;lt;h2&amp;gt; --&gt;&lt;h2 id="toc2"&gt;&lt;a name="x23 tone equal temperament-Kosmorsky's Sephiroth modes"&gt;&lt;/a&gt;&lt;!-- ws:end:WikiTextHeadingRule:6 --&gt;Kosmorsky's Sephiroth modes&lt;/h2&gt;