Kite's ups and downs notation: Difference between revisions

Wikispaces>TallKite
**Imported revision 557870423 - Original comment: **
Wikispaces>TallKite
**Imported revision 557878737 - Original comment: **
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<h2>IMPORTED REVISION FROM WIKISPACES</h2>
<h2>IMPORTED REVISION FROM WIKISPACES</h2>
This is an imported revision from Wikispaces. The revision metadata is included below for reference:<br>
This is an imported revision from Wikispaces. The revision metadata is included below for reference:<br>
: This revision was by author [[User:TallKite|TallKite]] and made on <tt>2015-09-01 02:57:17 UTC</tt>.<br>
: This revision was by author [[User:TallKite|TallKite]] and made on <tt>2015-09-01 06:47:12 UTC</tt>.<br>
: The original revision id was <tt>557870423</tt>.<br>
: The original revision id was <tt>557878737</tt>.<br>
: The revision comment was: <tt></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>
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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Gb^ Db^ Ab^ Eb^ Bb^ Gb Db Ab Eb Bb F C G D A E B Gv Dv Av Ev Bv
Gb^ Db^ Ab^ Eb^ Bb^ Gb Db Ab Eb Bb F C G D A E B Gv Dv Av Ev Bv


The problem is, there are a few places where the sequence of 7 letters breaks, and we actually have runs of 5 letters. This is the essentially pentatonic-friendly nature of 22-EDO asserting itself. Because 22-EDO pentatonically is like 19-EDO heptatonically, in that ups and downs are not necessary. Here's 22-EDO in pentatonic notation:
The problem is, there are a few places where the sequence of 7 letters breaks, and we actually have runs of 5 letters. This is the essentially pentatonic-friendly nature of 22-EDO asserting itself. By which is meant, 22-EDO pentatonically is like 19-EDO heptatonically, in that ups and downs are not necessary. Here's 22-EDO in pentatonic notation:


Gx Dx Ax F# C# G# D# A# F C G D A Fb Cb Gb Db Ab Fbb Cbb Gbb Dbb
Gx Dx Ax F# C# G# D# A# F C G D A Fb Cb Gb Db Ab Fbb Cbb Gbb Dbb
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__**Staff Notation**__
__**Staff Notation**__
For staff notation, just put an up or down to the left of the note and any standard accidental it might have. To write Db^ followed by Db in the same measure, use the mid sign: Db^ Db~. All 22 possible keys can be written out. The tonic is always a mid note, i.e. not up or down. Just as conventionally each black key produces both a sharp key and a flat key (Db major and C# minor), each of the 15 black keys of 22-EDO produces both, and there are 37 possible keys. The 2 most remote are Bbbb and F###, and triple-sharps and triple-flat keys seem rather extreme. Avoiding those, we have 35 possible tonics that run from Fbb to Bx. Some of the key signatures will have double-sharps or double-flats in them, or even triple-sharps.
For staff notation, just put an up or down to the left of the note and any standard accidental it might have. To write Db^ followed by Db in the same measure, use the mid sign: Db^ Db~. All 22 possible keys can be written out. The tonic is always a mid note, i.e. not up or down. Just as conventionally each black key produces both a sharp key and a flat key (Db major and C# minor), each of the 15 black keys of 22-EDO produces both, and there are 37 possible keys. The 2 most remote are Bbbb and F###, and triple-sharps and triple-flat keys seem rather extreme. Avoiding those, we have 35 possible tonics that run from Fbb to Bx. Some of the key signatures will have double-sharps or double-flats in them, or even triple-sharps.
C: no sharps
C: no sharps
G: 1 sharp
D: 2 sharps
...
C#: 7 sharps
C#: 7 sharps
G#: 6 sharps, 1 double-sharp on F
G#: 6 sharps, 1 double-sharp on F
D#: 5 sharps, 2 double-sharps on F and C
D#: 5 sharps, 2 double-sharps on F and C
B#: 2 sharps, 5 double-sharps on F , C, G, D and A
...
B#: 2 sharps, 5 double-sharps on F, C, G, D and A
...
Bx: 2 double-sharps on E and B, 5 triple-sharps on F, C, G, D and A
Bx: 2 double-sharps on E and B, 5 triple-sharps on F, C, G, D and A


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=__Naming Chords__=  
=__Naming Chords__=  


Ups and downs allow us to name any chord easily. First we need an exact definition of major, minor, perfect, etc. that works with all edos. The quality of an interval is defined by its position on the chain of 5ths. Perfect is 0-1 steps away, major/minor are 2-5 steps away, aug/dim are 6-12 steps away, etc.  
Ups and downs allow us to name any chord easily. First we need an exact definition of major, minor, perfect, etc. that works with all edos. The quality of an interval is defined by its position on the chain of 5ths. Perfect is 0-1 steps away, major/minor are 2-5 steps away, aug/dim are 6-12 steps away, etc.


There are 3 special cases to be addressed. The first is when the edo's 5th is narrower than 4\7, as in 16edo. Major is defined as always wider than minor, so major is not fifthwards but fourthwards:
There are 3 special cases to be addressed. The first is when the edo's 5th is narrower than 4\7, as in 16edo. Major is defined as always wider than minor, so major is not fifthwards but fourthwards:
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0-5-9-12 = vM,m7
0-5-9-12 = vM,m7


16edo: D * E * * F * G * A * B * * C * D, 1 key per #/b, ^/v not needed.
16edo: D * E * * F * G * A * B * * C * D, 1 key per #/b, ^/v not needed. # is fourthward.
chord components: P1 d2 m2 M2 m3 M3 A3/d4 P4 A4/d5 P5 d6 m6 M6/d7 m7 M7 A7 P8
chord components: P1 d2 m2 M2 m3 M3 A3/d4 P4 A4/d5 P5 d6 m6 M6/d7 m7 M7 A7 P8
chord roots: I #I/bbII bII II bIII III #III/vIV IV #IV/bV V #V/bbVI bVI VI bVII VII #VII/bI
chord roots: I #I/bbII bII II bIII III #III/vIV IV #IV/bV V #V/bbVI bVI VI bVII VII #VII/bI
0-2-9 = susm2
0-3-9 = sus2
0-3-9 = sus2
0-4-9 = m
0-4-9 = m
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21edo: D * * E * * F * * G * * A * * B * * C * * D, zero keys per #/b.
21edo: D * * E * * F * * G * * A * * B * * C * * D, zero keys per #/b.
chord components: P1 ^P1/vvP2 vP2 P2 ^P2 vP3 P3 ^P3 vP4 P4 ^P4 vP5 P5 ^P5 vP6 P6 ^P6 vP7 P7 ^P7 ^^P7/vP8
chord components: P1 ^P1/vvP2 vP2 P2 ^P2 vP3 P3 ^P3 vP4 P4 ^P4 vP5 P5 ^P5 vP6 P6 ^P6 vP7 P7 ^P7 ^^P7/vP8
Because everything is perfect, the quality can be omitted if we use the mid symbol "~".
Because everything is perfect, the quality can be omitted.
~1 ^1/vv2 v2 2 ^2 v3 3 ^3 v4 4 ^4 v5 5 ^5 v6 6 ^6 v7 7 ^7 ^^7/v8
chord components: 1 ^1/vv2 v2 2 ^2 v3 3 ^3 v4 4 ^4 v5 5 ^5 v6 6 ^6 v7 7 ^7 ^^7/v8
chord roots: I ^I vII II ^II vIII III vIII vIV IV ^IV vV V ^V vVI VI ^VI vVII VII ^VII vI
chord roots: I ^I vII II ^II vIII III vIII vIV IV ^IV vV V ^V vVI VI ^VI vVII VII ^VII vI
Quality can also be omitted in the chord names:
Quality can also be omitted in the chord names if we use the mid symbol "~":
0-3-12 = sus2
0-3-12 = sus2
0-4-12 = vv or sus^2
0-4-12 = vv or sus^2
0-5-12 = v
0-5-12 = v (a down chord, e.g. "C down")
0-6-12 = ~
0-6-12 = ~ (e.g. "D mid")
0-7-12 = ^
0-7-12 = ^ (e.g. "E flat up")
0-8-12 = ^^ or susv4
0-8-12 = ^^ or susv4
0-9-12 = sus4
0-9-12 = sus4
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0-7-12-15 = ^,~6
0-7-12-15 = ^,~6
0-7-12-14 = ^,v6
0-7-12-14 = ^,v6
0-6-12-19 = ~,^7
0-6-12-18 = ~7
0-6-12-17 = ~,v7
0-6-12-16 = ~,^6
0-6-12-15 = ~6
0-6-12-14 = ~,v6


24edo: D * * * E * F * * * G * * * A * * * B * C * * * D, 2 keys per #/b.
24edo: D * * * E * F * * * G * * * A * * * B * C * * * D, 2 keys per #/b.
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==__EDOs with an inaccurate 3/2__==  
==__EDOs with an inaccurate 3/2__==  


Not counting the trivial edos 2, 3, 4 and 6, there are only a few such edos: 8, 9, 11, 13, and 18. As seen in this diagram, they are the ones to the left of the light blue region, plus the ones to the right of the central line in the orange region. 23edo can be notated similarly to 16edo, using 13\23 instead of 14\23.
Not counting the trivial edos 2, 3, 4 and 6, there are only seven such edos. As seen in this diagram, they are the ones to the left of the central line in the light blue region, plus the ones to the right of the central line in the orange region. The ones on the left edge of the blue region are the fourthward ones like 16edo, and have been dealt with already. 23edo can be notated similarly to 16edo by using a fifth of 13\23 instead of 14\23. That leaves only four edos: 8, 11, 13, and 18.
 
[[image:The 5th of EDOs 5-53.png width="640" height="802"]]
 
 
There are two strategies for notating these "oddball" EDOs, besides heptatonic fifth-based notation with ups and downs. One is to switch from heptatonic notation to some other type. The orange region contains edos for which pentatonic notation is a natural fit, in the sense that no ups or downs are needed. This includes 8edo, 13edo and 18edo.
 
The other approach is to use some interval other than the fifth to generate the notation. Above I said 22edo using an even distribution of note names such as C _ _ D _ _ E _ _ F _ _ _ G _ _ A _ _ B _ _ C.
 
8edo 2nd-based: D E F G * A B C D = P1 - P2 - m3 - M3/m4 - M4/m5 - M5/m6 - M6 - P7 - P8
8edo wide-fifth pentatonic: D F * G * A C * D = P1 - ms3 - Ms3 - P4d - A4d/d5d - P5 - ms7 - Ms7 - P8
11edo 3rd-based: D * E F * G A * B C * D = P1 - m2 - M2 - P3 - m4 - M4 - m5 - M5 - P6 - m7 - M7 - P8
11edo wide-fifth pentatonic
P1 - ms3 - ^ms3/vMs3 - Ms3 - P4d - ^P4d/d5d - A4d/vP5d - P5d - ms7 - ^ms7/vMs7 - Ms7 - P8d
13edo 2nd-based: D * E * F * G A * B * C * D
 
 
 
8edo heptatonic fifth-basd (3/2 maps to 5\8 5th)
P1 - M7/m3 - M2 - P4 - M3/m6 - P5 - m7 - M6/m2 - P8
m2 is descending
 
8edo pentatonic fifth-based, fifthwards, no ^/v (3/2 maps to 5\8 5thoid)
P1 - ms3 - Ms3 - P4d - A4d/d5d - P5 - ms7 - Ms7 - P8
D F * G * A C * D
 
8edo octatonic (every note s a generator)
P1 - P2 - P3 - P4 - P5 - P6 - P7 - P8 - P9
 
8edo heptatonic second-based, seventhwards, no ups and downs (generator = 1\8 2nd):
heptatonic seventhwards chain of 2nds: M3 - M4 - M5 - M6 - P7 - P1 - P2 - m3 - m4 - m5 - m6 - d7 etc.
P1 - P2 - m3 - M3/m4 - M4/m5 - M5/m6 - M6 - P7 - P8
D E F G * A B C D
 
 
11edo heptatonic narrow-fifth-based, fourthwards with ^/v, 2 keys per #/b (3/2 maps to 6\11 5th):
P1 m2 vM2/m3 M2/^m3 M3 P4 P5 m6 vM6/m7 M6/^m7 M7 P8
problematic because m3 = 2\11 is narrower than M2 = 3\11
 
11edo nonotonic narrow-fifth-based, fourthwards with no ups and downs (3/2 maps to 6\11 6th):
nonotonic fourthwards chain of sixths:
M2 - M7 - M3 - M8 - M4 - M9 - P5 - P1 - P6 - m2 - m7 - m3 - m8 - m4 - m9 - d5 etc.
P1 m2 M2/m3 M3/m4 M4 P5 P6 m7 M7/m8 M8/m9 M9 P8
requires learning nonotonic interval arithmetic and staff notation
 
 
__**11edo heptatonic third-based**__, sixthwards with no ups and downs (generator = 3\11 3rd):
sixthwards chain of thirds: M5 - M7 - M2 - M4 - P6 - P1 - P3 - m5 - m7 - m2 - m4 - d6 etc.
P1 m2 M2 P3 m4 M4 m5 M5 P6 m7 M7 P8
requires learning third-based qualities
D * E F * G A * B C * D
 
11edo heptatonic wide-fifth-based, 5 keys per #/b (3/2 maps to 7\11 5th):
P1 m3 M7 m2 P4 m6 M3 P5 m7 m2 M6 P8
problematic because m2 is descending
 
11edo pentatonic wide-fifth-based, fifthwards using ^/v, 2 keys per #/b (3/2 maps to 7\11 6th):
pentatonic fifthwards chain of fifthoids: ms3 - ms7 - P4d - P1 - P5d - Ms3 - Ms7 - A4d etc.
P1 - ms3 - ^ms3/vMs3 - Ms3 - P4d - ^P4d/d5d - A4d/vP5d - P5d - ms7 - ^ms7/vMs7 - Ms7 - P8d
requires learning pentatonic interval arithmetic and notation
 
11edo octatonic wide-fifth-based, fifthwards, no ^/v (3/2 maps to 7\11 6th):
octatonic chain of 6ths: m3 - m8 - m5 - m2 - m7 - P4 - P1 - P6 - M3 - M8 - M5 - M2 - M7
P1 - m2 - M2/m3 - M3 - P4 - m5 - M5 - P6 - m7 - M7/m8 - M8 - P9
requires learning octatonic interval arithmetic and notation
 
 
 
13edo heptatonic narrow-fifth-based, fourthwards, 3 keys per #/b, (3/2 maps to 7\13 5th):
P1 - m2 - m3 - vM2/^m3 - M2 - M3 - P4 - P5 - m6 - m7 - vM6/^m7 - M6 - M7 - P8
problematic because m3 = 2\13 is narrower than M2 = 4\13
 
(13edo undecatonic narrow-fifth-based, 3/2 maps to 7\13 7th)
 
__**13edo second-based**__, secondwards, no ups and downs (generator = 2\13 2nd):
D * E * F * G A * B * C * D
P1 - A1/d2 - P2 - m3 - M3 - m4 - M4 - m5 - M5 - m6 - M6 - P7 - A7/d8 - P8
 
13edo heptatonic wide-fifth-based (3/2 maps to 8\13 5th)
m2 is descending
 
13edo pentatonic wide-fifth-based, fifthwards
P1 - A1/ds3 - ms3 - Ms3 - As3/d4d - P4d - A4d - d5d - P5d - A5d/ds7 - ms7 - Ms7 - As7/d8d - P8d
 
(13edo octatonic wide-fifth-based, fourthwards)
 


[[image:The 5th of EDOs 5-53.png width="800" height="1004"]]




There are several strategies for notating these EDOs. Since heptatonic fifth-based may be better notated with a notation not generated by the fifth.</pre></div>
18edo</pre></div>
<h4>Original HTML content:</h4>
<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;Ups and Downs Notation&lt;/title&gt;&lt;/head&gt;&lt;body&gt;&lt;!-- ws:start:WikiTextHeadingRule:0:&amp;lt;h1&amp;gt; --&gt;&lt;h1 id="toc0"&gt;&lt;a name="x&amp;quot;Ups and Downs&amp;quot; Notation"&gt;&lt;/a&gt;&lt;!-- ws:end:WikiTextHeadingRule:0 --&gt;&amp;quot;Ups and Downs&amp;quot; Notation&lt;/h1&gt;
<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;Ups and Downs Notation&lt;/title&gt;&lt;/head&gt;&lt;body&gt;&lt;!-- ws:start:WikiTextHeadingRule:0:&amp;lt;h1&amp;gt; --&gt;&lt;h1 id="toc0"&gt;&lt;a name="x&amp;quot;Ups and Downs&amp;quot; Notation"&gt;&lt;/a&gt;&lt;!-- ws:end:WikiTextHeadingRule:0 --&gt;&amp;quot;Ups and Downs&amp;quot; Notation&lt;/h1&gt;
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Gb^ Db^ Ab^ Eb^ Bb^ Gb Db Ab Eb Bb F C G D A E B Gv Dv Av Ev Bv&lt;br /&gt;
Gb^ Db^ Ab^ Eb^ Bb^ Gb Db Ab Eb Bb F C G D A E B Gv Dv Av Ev Bv&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
The problem is, there are a few places where the sequence of 7 letters breaks, and we actually have runs of 5 letters. This is the essentially pentatonic-friendly nature of 22-EDO asserting itself. Because 22-EDO pentatonically is like 19-EDO heptatonically, in that ups and downs are not necessary. Here's 22-EDO in pentatonic notation:&lt;br /&gt;
The problem is, there are a few places where the sequence of 7 letters breaks, and we actually have runs of 5 letters. This is the essentially pentatonic-friendly nature of 22-EDO asserting itself. By which is meant, 22-EDO pentatonically is like 19-EDO heptatonically, in that ups and downs are not necessary. Here's 22-EDO in pentatonic notation:&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
Gx Dx Ax F# C# G# D# A# F C G D A Fb Cb Gb Db Ab Fbb Cbb Gbb Dbb&lt;br /&gt;
Gx Dx Ax F# C# G# D# A# F C G D A Fb Cb Gb Db Ab Fbb Cbb Gbb Dbb&lt;br /&gt;
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&lt;u&gt;&lt;strong&gt;Staff Notation&lt;/strong&gt;&lt;/u&gt;&lt;br /&gt;
&lt;u&gt;&lt;strong&gt;Staff Notation&lt;/strong&gt;&lt;/u&gt;&lt;br /&gt;
For staff notation, just put an up or down to the left of the note and any standard accidental it might have. To write Db^ followed by Db in the same measure, use the mid sign: Db^ Db~. All 22 possible keys can be written out. The tonic is always a mid note, i.e. not up or down. Just as conventionally each black key produces both a sharp key and a flat key (Db major and C# minor), each of the 15 black keys of 22-EDO produces both, and there are 37 possible keys. The 2 most remote are Bbbb and F###, and triple-sharps and triple-flat keys seem rather extreme. Avoiding those, we have 35 possible tonics that run from Fbb to Bx. Some of the key signatures will have double-sharps or double-flats in them, or even triple-sharps.&lt;br /&gt;
For staff notation, just put an up or down to the left of the note and any standard accidental it might have. To write Db^ followed by Db in the same measure, use the mid sign: Db^ Db~. All 22 possible keys can be written out. The tonic is always a mid note, i.e. not up or down. Just as conventionally each black key produces both a sharp key and a flat key (Db major and C# minor), each of the 15 black keys of 22-EDO produces both, and there are 37 possible keys. The 2 most remote are Bbbb and F###, and triple-sharps and triple-flat keys seem rather extreme. Avoiding those, we have 35 possible tonics that run from Fbb to Bx. Some of the key signatures will have double-sharps or double-flats in them, or even triple-sharps.&lt;br /&gt;
&lt;br /&gt;
C: no sharps&lt;br /&gt;
C: no sharps&lt;br /&gt;
G: 1 sharp&lt;br /&gt;
D: 2 sharps&lt;br /&gt;
...&lt;br /&gt;
C#: 7 sharps&lt;br /&gt;
C#: 7 sharps&lt;br /&gt;
G#: 6 sharps, 1 double-sharp on F&lt;br /&gt;
G#: 6 sharps, 1 double-sharp on F&lt;br /&gt;
D#: 5 sharps, 2 double-sharps on F and C&lt;br /&gt;
D#: 5 sharps, 2 double-sharps on F and C&lt;br /&gt;
B#: 2 sharps, 5 double-sharps on F , C, G, D and A&lt;br /&gt;
...&lt;br /&gt;
B#: 2 sharps, 5 double-sharps on F, C, G, D and A&lt;br /&gt;
...&lt;br /&gt;
Bx: 2 double-sharps on E and B, 5 triple-sharps on F, C, G, D and A&lt;br /&gt;
Bx: 2 double-sharps on E and B, 5 triple-sharps on F, C, G, D and A&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
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&lt;!-- ws:start:WikiTextHeadingRule:2:&amp;lt;h1&amp;gt; --&gt;&lt;h1 id="toc1"&gt;&lt;a name="Naming Chords"&gt;&lt;/a&gt;&lt;!-- ws:end:WikiTextHeadingRule:2 --&gt;&lt;u&gt;Naming Chords&lt;/u&gt;&lt;/h1&gt;
&lt;!-- ws:start:WikiTextHeadingRule:2:&amp;lt;h1&amp;gt; --&gt;&lt;h1 id="toc1"&gt;&lt;a name="Naming Chords"&gt;&lt;/a&gt;&lt;!-- ws:end:WikiTextHeadingRule:2 --&gt;&lt;u&gt;Naming Chords&lt;/u&gt;&lt;/h1&gt;
  &lt;br /&gt;
  &lt;br /&gt;
Ups and downs allow us to name any chord easily. First we need an exact definition of major, minor, perfect, etc. that works with all edos. The quality of an interval is defined by its position on the chain of 5ths. Perfect is 0-1 steps away, major/minor are 2-5 steps away, aug/dim are 6-12 steps away, etc. &lt;br /&gt;
Ups and downs allow us to name any chord easily. First we need an exact definition of major, minor, perfect, etc. that works with all edos. The quality of an interval is defined by its position on the chain of 5ths. Perfect is 0-1 steps away, major/minor are 2-5 steps away, aug/dim are 6-12 steps away, etc.&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
There are 3 special cases to be addressed. The first is when the edo's 5th is narrower than 4\7, as in 16edo. Major is defined as always wider than minor, so major is not fifthwards but fourthwards:&lt;br /&gt;
There are 3 special cases to be addressed. The first is when the edo's 5th is narrower than 4\7, as in 16edo. Major is defined as always wider than minor, so major is not fifthwards but fourthwards:&lt;br /&gt;
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0-5-9-12 = vM,m7&lt;br /&gt;
0-5-9-12 = vM,m7&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
16edo: D * E * * F * G * A * B * * C * D, 1 key per #/b, ^/v not needed.&lt;br /&gt;
16edo: D * E * * F * G * A * B * * C * D, 1 key per #/b, ^/v not needed. # is fourthward.&lt;br /&gt;
chord components: P1 d2 m2 M2 m3 M3 A3/d4 P4 A4/d5 P5 d6 m6 M6/d7 m7 M7 A7 P8&lt;br /&gt;
chord components: P1 d2 m2 M2 m3 M3 A3/d4 P4 A4/d5 P5 d6 m6 M6/d7 m7 M7 A7 P8&lt;br /&gt;
chord roots: I #I/bbII bII II bIII III #III/vIV IV #IV/bV V #V/bbVI bVI VI bVII VII #VII/bI&lt;br /&gt;
chord roots: I #I/bbII bII II bIII III #III/vIV IV #IV/bV V #V/bbVI bVI VI bVII VII #VII/bI&lt;br /&gt;
0-2-9 = susm2&lt;br /&gt;
0-3-9 = sus2&lt;br /&gt;
0-3-9 = sus2&lt;br /&gt;
0-4-9 = m&lt;br /&gt;
0-4-9 = m&lt;br /&gt;
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21edo: D * * E * * F * * G * * A * * B * * C * * D, zero keys per #/b.&lt;br /&gt;
21edo: D * * E * * F * * G * * A * * B * * C * * D, zero keys per #/b.&lt;br /&gt;
chord components: P1 ^P1/vvP2 vP2 P2 ^P2 vP3 P3 ^P3 vP4 P4 ^P4 vP5 P5 ^P5 vP6 P6 ^P6 vP7 P7 ^P7 ^^P7/vP8&lt;br /&gt;
chord components: P1 ^P1/vvP2 vP2 P2 ^P2 vP3 P3 ^P3 vP4 P4 ^P4 vP5 P5 ^P5 vP6 P6 ^P6 vP7 P7 ^P7 ^^P7/vP8&lt;br /&gt;
Because everything is perfect, the quality can be omitted if we use the mid symbol &amp;quot;~&amp;quot;.&lt;br /&gt;
Because everything is perfect, the quality can be omitted.&lt;br /&gt;
~1 ^1/vv2 v2 2 ^2 v3 3 ^3 v4 4 ^4 v5 5 ^5 v6 6 ^6 v7 7 ^7 ^^7/v8&lt;br /&gt;
chord components: 1 ^1/vv2 v2 2 ^2 v3 3 ^3 v4 4 ^4 v5 5 ^5 v6 6 ^6 v7 7 ^7 ^^7/v8&lt;br /&gt;
chord roots: I ^I vII II ^II vIII III vIII vIV IV ^IV vV V ^V vVI VI ^VI vVII VII ^VII vI&lt;br /&gt;
chord roots: I ^I vII II ^II vIII III vIII vIV IV ^IV vV V ^V vVI VI ^VI vVII VII ^VII vI&lt;br /&gt;
Quality can also be omitted in the chord names:&lt;br /&gt;
Quality can also be omitted in the chord names if we use the mid symbol &amp;quot;~&amp;quot;:&lt;br /&gt;
0-3-12 = sus2&lt;br /&gt;
0-3-12 = sus2&lt;br /&gt;
0-4-12 = vv or sus^2&lt;br /&gt;
0-4-12 = vv or sus^2&lt;br /&gt;
0-5-12 = v&lt;br /&gt;
0-5-12 = v (a down chord, e.g. &amp;quot;C down&amp;quot;)&lt;br /&gt;
0-6-12 = ~&lt;br /&gt;
0-6-12 = ~ (e.g. &amp;quot;D mid&amp;quot;)&lt;br /&gt;
0-7-12 = ^&lt;br /&gt;
0-7-12 = ^ (e.g. &amp;quot;E flat up&amp;quot;)&lt;br /&gt;
0-8-12 = ^^ or susv4&lt;br /&gt;
0-8-12 = ^^ or susv4&lt;br /&gt;
0-9-12 = sus4&lt;br /&gt;
0-9-12 = sus4&lt;br /&gt;
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0-7-12-15 = ^,~6&lt;br /&gt;
0-7-12-15 = ^,~6&lt;br /&gt;
0-7-12-14 = ^,v6&lt;br /&gt;
0-7-12-14 = ^,v6&lt;br /&gt;
&lt;br /&gt;
0-6-12-19 = ~,^7&lt;br /&gt;
0-6-12-18 = ~7&lt;br /&gt;
0-6-12-17 = ~,v7&lt;br /&gt;
0-6-12-16 = ~,^6&lt;br /&gt;
0-6-12-15 = ~6&lt;br /&gt;
0-6-12-14 = ~,v6&lt;br /&gt;
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24edo: D * * * E * F * * * G * * * A * * * B * C * * * D, 2 keys per #/b.&lt;br /&gt;
24edo: D * * * E * F * * * G * * * A * * * B * C * * * D, 2 keys per #/b.&lt;br /&gt;
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Not counting the trivial edos 2, 3, 4 and 6, there are only a few such edos: 8, 9, 11, 13, and 18. As seen in this diagram, they are the ones to the left of the light blue region, plus the ones to the right of the central line in the orange region. 23edo can be notated similarly to 16edo, using 13\23 instead of 14\23.&lt;br /&gt;
Not counting the trivial edos 2, 3, 4 and 6, there are only seven such edos. As seen in this diagram, they are the ones to the left of the central line in the light blue region, plus the ones to the right of the central line in the orange region. The ones on the left edge of the blue region are the fourthward ones like 16edo, and have been dealt with already. 23edo can be notated similarly to 16edo by using a fifth of 13\23 instead of 14\23. That leaves only four edos: 8, 11, 13, and 18.&lt;br /&gt;
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There are two strategies for notating these &amp;quot;oddball&amp;quot; EDOs, besides heptatonic fifth-based notation with ups and downs. One is to switch from heptatonic notation to some other type. The orange region contains edos for which pentatonic notation is a natural fit, in the sense that no ups or downs are needed. This includes 8edo, 13edo and 18edo.&lt;br /&gt;
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The other approach is to use some interval other than the fifth to generate the notation. Above I said 22edo using an even distribution of note names such as C _ _ D _ _ E _ _ F _ _ _ G _ _ A _ _ B _ _ C.&lt;br /&gt;
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8edo 2nd-based: D E F G * A B C D = P1 - P2 - m3 - M3/m4 - M4/m5 - M5/m6 - M6 - P7 - P8&lt;br /&gt;
8edo wide-fifth pentatonic: D F * G * A C * D = P1 - ms3 - Ms3 - P4d - A4d/d5d - P5 - ms7 - Ms7 - P8&lt;br /&gt;
11edo 3rd-based: D * E F * G A * B C * D = P1 - m2 - M2 - P3 - m4 - M4 - m5 - M5 - P6 - m7 - M7 - P8&lt;br /&gt;
11edo wide-fifth pentatonic&lt;br /&gt;
P1 - ms3 - ^ms3/vMs3 - Ms3 - P4d - ^P4d/d5d - A4d/vP5d - P5d - ms7 - ^ms7/vMs7 - Ms7 - P8d&lt;br /&gt;
13edo 2nd-based: D * E * F * G A * B * C * D&lt;br /&gt;
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8edo heptatonic fifth-basd (3/2 maps to 5\8 5th)&lt;br /&gt;
P1 - M7/m3 - M2 - P4 - M3/m6 - P5 - m7 - M6/m2 - P8&lt;br /&gt;
m2 is descending&lt;br /&gt;
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8edo pentatonic fifth-based, fifthwards, no ^/v (3/2 maps to 5\8 5thoid)&lt;br /&gt;
P1 - ms3 - Ms3 - P4d - A4d/d5d - P5 - ms7 - Ms7 - P8&lt;br /&gt;
D F * G * A C * D&lt;br /&gt;
&lt;br /&gt;
8edo octatonic (every note s a generator)&lt;br /&gt;
P1 - P2 - P3 - P4 - P5 - P6 - P7 - P8 - P9&lt;br /&gt;
&lt;br /&gt;
8edo heptatonic second-based, seventhwards, no ups and downs (generator = 1\8 2nd):&lt;br /&gt;
heptatonic seventhwards chain of 2nds: M3 - M4 - M5 - M6 - P7 - P1 - P2 - m3 - m4 - m5 - m6 - d7 etc.&lt;br /&gt;
P1 - P2 - m3 - M3/m4 - M4/m5 - M5/m6 - M6 - P7 - P8&lt;br /&gt;
D E F G * A B C D&lt;br /&gt;
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11edo heptatonic narrow-fifth-based, fourthwards with ^/v, 2 keys per #/b (3/2 maps to 6\11 5th):&lt;br /&gt;
P1 m2 vM2/m3 M2/^m3 M3 P4 P5 m6 vM6/m7 M6/^m7 M7 P8&lt;br /&gt;
problematic because m3 = 2\11 is narrower than M2 = 3\11&lt;br /&gt;
&lt;br /&gt;
11edo nonotonic narrow-fifth-based, fourthwards with no ups and downs (3/2 maps to 6\11 6th):&lt;br /&gt;
nonotonic fourthwards chain of sixths:&lt;br /&gt;
M2 - M7 - M3 - M8 - M4 - M9 - P5 - P1 - P6 - m2 - m7 - m3 - m8 - m4 - m9 - d5 etc.&lt;br /&gt;
P1 m2 M2/m3 M3/m4 M4 P5 P6 m7 M7/m8 M8/m9 M9 P8&lt;br /&gt;
requires learning nonotonic interval arithmetic and staff notation&lt;br /&gt;
&lt;br /&gt;
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&lt;u&gt;&lt;strong&gt;11edo heptatonic third-based&lt;/strong&gt;&lt;/u&gt;, sixthwards with no ups and downs (generator = 3\11 3rd):&lt;br /&gt;
sixthwards chain of thirds: M5 - M7 - M2 - M4 - P6 - P1 - P3 - m5 - m7 - m2 - m4 - d6 etc.&lt;br /&gt;
P1 m2 M2 P3 m4 M4 m5 M5 P6 m7 M7 P8&lt;br /&gt;
requires learning third-based qualities&lt;br /&gt;
D * E F * G A * B C * D&lt;br /&gt;
&lt;br /&gt;
11edo heptatonic wide-fifth-based, 5 keys per #/b (3/2 maps to 7\11 5th):&lt;br /&gt;
P1 m3 M7 m2 P4 m6 M3 P5 m7 m2 M6 P8&lt;br /&gt;
problematic because m2 is descending&lt;br /&gt;
&lt;br /&gt;
11edo pentatonic wide-fifth-based, fifthwards using ^/v, 2 keys per #/b (3/2 maps to 7\11 6th):&lt;br /&gt;
pentatonic fifthwards chain of fifthoids: ms3 - ms7 - P4d - P1 - P5d - Ms3 - Ms7 - A4d etc.&lt;br /&gt;
P1 - ms3 - ^ms3/vMs3 - Ms3 - P4d - ^P4d/d5d - A4d/vP5d - P5d - ms7 - ^ms7/vMs7 - Ms7 - P8d&lt;br /&gt;
requires learning pentatonic interval arithmetic and notation&lt;br /&gt;
&lt;br /&gt;
11edo octatonic wide-fifth-based, fifthwards, no ^/v (3/2 maps to 7\11 6th):&lt;br /&gt;
octatonic chain of 6ths: m3 - m8 - m5 - m2 - m7 - P4 - P1 - P6 - M3 - M8 - M5 - M2 - M7&lt;br /&gt;
P1 - m2 - M2/m3 - M3 - P4 - m5 - M5 - P6 - m7 - M7/m8 - M8 - P9&lt;br /&gt;
requires learning octatonic interval arithmetic and notation&lt;br /&gt;
&lt;br /&gt;
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13edo heptatonic narrow-fifth-based, fourthwards, 3 keys per #/b, (3/2 maps to 7\13 5th):&lt;br /&gt;
P1 - m2 - m3 - vM2/^m3 - M2 - M3 - P4 - P5 - m6 - m7 - vM6/^m7 - M6 - M7 - P8&lt;br /&gt;
problematic because m3 = 2\13 is narrower than M2 = 4\13&lt;br /&gt;
&lt;br /&gt;
(13edo undecatonic narrow-fifth-based, 3/2 maps to 7\13 7th)&lt;br /&gt;
&lt;br /&gt;
&lt;u&gt;&lt;strong&gt;13edo second-based&lt;/strong&gt;&lt;/u&gt;, secondwards, no ups and downs (generator = 2\13 2nd):&lt;br /&gt;
D * E * F * G A * B * C * D&lt;br /&gt;
P1 - A1/d2 - P2 - m3 - M3 - m4 - M4 - m5 - M5 - m6 - M6 - P7 - A7/d8 - P8&lt;br /&gt;
&lt;br /&gt;
13edo heptatonic wide-fifth-based (3/2 maps to 8\13 5th)&lt;br /&gt;
m2 is descending&lt;br /&gt;
&lt;br /&gt;
13edo pentatonic wide-fifth-based, fifthwards&lt;br /&gt;
P1 - A1/ds3 - ms3 - Ms3 - As3/d4d - P4d - A4d - d5d - P5d - A5d/ds7 - ms7 - Ms7 - As7/d8d - P8d&lt;br /&gt;
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(13edo octatonic wide-fifth-based, fourthwards)&lt;br /&gt;
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There are several strategies for notating these EDOs. Since heptatonic fifth-based may be better notated with a notation not generated by the fifth.&lt;/body&gt;&lt;/html&gt;</pre></div>
18edo&lt;/body&gt;&lt;/html&gt;</pre></div>