Dome: Difference between revisions

From Xenharmonic Wiki
Jump to navigation Jump to search
Wikispaces>guest
**Imported revision 317697486 - Original comment: **
Fredg999 (talk | contribs)
m Direct link to Fokker arena (new redirect)
 
(17 intermediate revisions by 6 users not shown)
Line 1: Line 1:
<h2>IMPORTED REVISION FROM WIKISPACES</h2>
{{About|a collection of scales|a type of scale|Modal union}}
This is an imported revision from Wikispaces. The revision metadata is included below for reference:<br>
A '''dome''' is a collection of [[Periodic scale #Rotations|rotations]] of a scale that comes from a given [[Fokker block]] recipe. [[Mike Battaglia]] coined the term (a permutation of the letters of "mode").
: This revision was by author [[User:guest|guest]] and made on <tt>2012-04-04 15:09:38 UTC</tt>.<br>
: The original revision id was <tt>317697486</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>
<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">A **dome** is a collection of scales, which are equivalent up to modal rotation, which is produced by shifting the lattice coset of unison vectors around on a [[Fokker blocks|Fokker block]].


&lt;span style="background-color: rgba(255,255,255,0.917969); color: #222222; font-family: arial,sans-serif;"&gt;For example, if you look at all of the scales that you can get with the 25/24 and &lt;/span&gt;&lt;span style="background-color: rgba(255,255,255,0.917969); color: #222222; font-family: arial,sans-serif;"&gt;81/80 unison vectors which contain 1/1, you'll find that you get 49 different scales. If we consider scales which are modally equivalent to be the same "dome," then the playing field reduces to 7 fundamental "domes" which you can get out of the 25/24 and 81/80 Fokker block. Each dome of this block is a collection of 7 scales which are modally equivalent. However, every dome is modally independent from every other dome of the block.&lt;/span&gt;
For example, if you look at all Fokker block scales that you can get with the 25/24 and 81/80 chromas, you will find that you get 49 different scales. If we consider scales which are modally equivalent to be in the same dome, then the playing field reduces to seven (heptatonic) domes obtainable from the 25/24 and 81/80 [[Fokker arena]]. Each dome of this arena is a collection of seven periodic scales which are modally equivalent, which is to say, rotations of each other. However, every dome is independent from every other dome of the arena; the domes partition the set of scales of the arena into disjoint sets.  


The term (which is a permutation of the letters of the word "mode") was invented by Mike Battaglia to describe the way different [[Fokker blocks]] with the same unison vectors (that are not modes) are related to each other.</pre></div>
While we have defined a dome as a set, it should be noted it has a natural cyclic group structure.
<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;Dome&lt;/title&gt;&lt;/head&gt;&lt;body&gt;A &lt;strong&gt;dome&lt;/strong&gt; is a collection of scales, which are equivalent up to modal rotation, which is produced by shifting the lattice coset of unison vectors around on a &lt;a class="wiki_link" href="/Fokker%20blocks"&gt;Fokker block&lt;/a&gt;.&lt;br /&gt;
[[Category:Scale]]
&lt;br /&gt;
[[Category:Math]]
&lt;span style="background-color: rgba(255,255,255,0.917969); color: #222222; font-family: arial,sans-serif;"&gt;For example, if you look at all of the scales that you can get with the 25/24 and &lt;/span&gt;&lt;span style="background-color: rgba(255,255,255,0.917969); color: #222222; font-family: arial,sans-serif;"&gt;81/80 unison vectors which contain 1/1, you'll find that you get 49 different scales. If we consider scales which are modally equivalent to be the same &amp;quot;dome,&amp;quot; then the playing field reduces to 7 fundamental &amp;quot;domes&amp;quot; which you can get out of the 25/24 and 81/80 Fokker block. Each dome of this block is a collection of 7 scales which are modally equivalent. However, every dome is modally independent from every other dome of the block.&lt;/span&gt;&lt;br /&gt;
[[Category:Fokker block]]
&lt;br /&gt;
[[Category:Terms]]
The term (which is a permutation of the letters of the word &amp;quot;mode&amp;quot;) was invented by Mike Battaglia to describe the way different &lt;a class="wiki_link" href="/Fokker%20blocks"&gt;Fokker blocks&lt;/a&gt; with the same unison vectors (that are not modes) are related to each other.&lt;/body&gt;&lt;/html&gt;</pre></div>

Latest revision as of 18:12, 28 July 2025

This page is about a collection of scales. For a type of scale, see Modal union.

A dome is a collection of rotations of a scale that comes from a given Fokker block recipe. Mike Battaglia coined the term (a permutation of the letters of "mode").

For example, if you look at all Fokker block scales that you can get with the 25/24 and 81/80 chromas, you will find that you get 49 different scales. If we consider scales which are modally equivalent to be in the same dome, then the playing field reduces to seven (heptatonic) domes obtainable from the 25/24 and 81/80 Fokker arena. Each dome of this arena is a collection of seven periodic scales which are modally equivalent, which is to say, rotations of each other. However, every dome is independent from every other dome of the arena; the domes partition the set of scales of the arena into disjoint sets.

While we have defined a dome as a set, it should be noted it has a natural cyclic group structure.