Xenharmonic Wiki

The Nexus: Difference between revisions

← Older edit
VisualWikitext
Aura (talk | contribs)
autopatrolled, emailconfirmed
6,012 edits
No edit summary
Finalize the data
 
(24 intermediate revisions by 7 users not shown)
Line 1: Line 1:
{{Technical data page}}
'''The Nexus''' is a collection of temperaments of different ranks, including subgroup temperaments, that all temper out the [[nexus comma]] – the unnoticeable comma with the ratio 1771561/1769472, and a monzo of {{monzo|-16 -3 0 0 6}}. Among the known branches of this collection are nexus, schisnex, nexiquart, altinex, and tribilo.
'''The Nexus''' is a collection of temperaments of different ranks, including subgroup temperaments, that all temper out the [[nexus comma]] – the unnoticeable comma with the ratio 1771561/1769472, and a monzo of {{monzo|-16 -3 0 0 6}}. Among the known branches of this collection are nexus, schisnex, nexiquart, altinex, and tribilo.


Temperaments discussed elsewhere are:
Because the nexus comma is the difference between (121/96)<sup>3</sup> and 2/1, all nexus temperaments divide 2/1 into three equal parts of (approximately) 400 cents.
* ''[[Tyr]]'', {3025/3024, 102487/102400}


= Rank-4 temperaments =
== Rank-4 temperaments ==
The parent temperament of this whole collection is rank-4 temperament. However, there are other rank-4 extensions which have yet to be explored.
See [[Catalog of rank-4 temperaments #Nexus (1771561/1769472)]].  


== Nexus ==
The parent temperament of this whole collection is a rank-4 temperament. However, there are other rank-4 extensions which have yet to be explored.
{{main| Nexus family }}


The parent temperament for the Nexus is Nexus temperament itself.  In this temperament, the 5-limit and 7-limit parts are represented by independent generators.
== Rank-3 temperaments ==
From the rank-4 parent temperament, there are several rank-3 temperaments that can be derived.


Subgroup: 2.3.5.7.11
Temperaments not discussed here include:  
* ''[[Tyr]]'' (+3025/3024) → [[Landscape family #Tyr]]


[[Comma list]]: [[1771561/1769472]]
=== Schisnex ===
Named by [[Aura]] in 2021, schisnex adds the [[nexus comma]] to the list of commas tempered out. Thus the generator for [[7/1|7]] is indepedent.


[[Mapping]]: [{{val| 3 0 0 0 8}}, {{val| 0 2 0 0 1}}, {{val| 0 0 1 0 0}}, {{val| 0 0 0 1 0}}]
[[Subgroup]]: 2.3.5.7.11


Mapping generators: ~121/96, ~1331/768, ~5/1, ~7/1
[[Comma list]]: 32805/32768, 1771561/1769472


{{Multival|legend=1|rank=4| 6 0 0 3 -16 }}
{{Mapping|legend=1| 3 0 45 0 8 | 0 2 -16 0 1 | 0 0 0 1 0 }}
: mapping generators: ~121/96, ~1331/768, ~7


[[POTE generator]]s: ~1331/768 = 950.9518, ~5/4 = 386.2068, ~7/4 = 968.6966
[[Optimal tuning]]s:
* [[WE]]: ~121/96 = 400.0305{{c}}, ~1331/768 = 950.9426{{c}}, ~7/4 = 968.6428{{c}}
: [[error map]]: {{val| +0.092 -0.070 -0.022 -0.000 -0.131 }}
* [[CWE]]: ~121/96 = 400.0000{{c}}, ~1331/768 = 950.8678{{c}}, ~7/4 = 968.6270{{c}}
: error map: {{val| 0.000 -0.219 -0.199 -0.199 -0.450 }}


{{Val list|legend=1| 9, 15, 24, 39d, 48, 57, 63, 72, 159, 183, 198, 255, 270, 342, 612, 954, 1566 }}
{{Optimal ET sequence|legend=1| 24, 48c, 111cd, 135, 159, 183, 342, 1209, 1551e, 1893e, 2235ce, 5703bbcddeeee }}


[[Badness]]: 0.588 × 10<sup>-6</sup>
[[Badness]] (Sintel): 6.19


= Rank-3 temperaments =
=== Nexiquart ===
From the rank-4 parent temperament, there are several rank-3 temperaments that can be derived.
This temperament can be seen as adding the [[quartisma]] to the list of tempered out commas on account of the quartisma being an unnoticeable comma for adding the 7-limit to the mix.
 
{{todo|inline=1| expand | comment = Fill the data chunks. }}


== Schisnex ==
[[Subgroup]]: 2.3.5.7.11
This temperament adds the [[schisma]] to the list of tempered out commas on account of the schisma being an unnoticeable comma for adding the 5-limit to the mix.


Subgroup: 2.3.5.7.11
[[Comma list]]: 19712/19683, 1771561/1769472


Comma list: 32805/32768, 1771561/1769472
{{Mapping|legend=1| 3 0 0 -32 8 | 0 2 0 17 1 | 0 0 1 0 0 }}
 
: mapping generators: ~121/96, ~1331/768, ~5
Mapping:
 
Wedgie:
 
POTE generators: ⟨400.0000, 950.8701, 3368.5689]
 
{{Val list|legend=1| 24p, 135p, 159, 183, 207, 342, 525, 684, 867 }}
 
Badness:
 
== Nexiquart ==
This temperament can be seen as adding the [[quartisma]] to the list of tempered out commas on account of the quartisma being an unnoticeable comma for adding the 7-limit to the mix.


Subgroup: 2.3.5.7.11
[[Optimal tuning]]s:  
* [[WE]]: ~121/96 = 399.9912{{c}}, ~1331/768 = 951.0868{{c}}, ~5/4 = 386.3663{{c}}
: [[error map]]: {{val| -0.026 +0.219 -0.000 -0.069 -0.301 }}
* [[CWE]]: ~121/96 = 400.0000{{c}}, ~1331/768 = 951.1062{{c}}, ~5/4 = 386.3573{{c}}
: error map: {{val| 0.000 +0.257 +0.044 -0.021 -0.212 }}


Comma list: 19712/19683, 1771561/1769472
{{Optimal ET sequence|legend=1| 24, 48d, 87d, 111, 159, 246, 270, 1215, 1485, 1755, 2025, 2295b }}


Mapping:  
[[Badness]] (Sintel): 7.54


Wedgie:
== Rank-2 temperaments ==
Rank-2 temperaments in the Nexus include [[septiennealimmal clan #Hemiennealimmal|hemiennealimmal]], [[misty family #Hemimist|hemimist]], [[schismatic family #Hemiterm|hemiterm]], [[schismatic family #Altinex|altinex]], [[canopic clan #Mirkat|mirkat]], [[kleismic family #Tritikleismic|tritikleismic]], [[vulture family #Terture|terture]], and [[landscape microtemperaments #Avicenna|avicenna]].


POTE generators:
Considered below is the 2.3.11-subgroup temperament tribilo.


Vals:
=== Tribilo ===
Tribilo is the pure rank-2 2.3.11-subgroup temperament that tempers out the nexus comma – its name comes from the nexus comma being referred to as the "tribilo comma" in [[color notation]].


Badness:
[[Subgroup]]: 2.3.11


= Rank-2 temperaments =
[[Comma list]]: 1771561/1769472
So far, among the only known rank-2 temperaments in the Nexus are Altinex and Tribilo temperament.


== Altinex ==
{{Mapping|legend=2| 3 0 8 | 0 2 1 }}
: mapping generators: ~121/96, ~1331/768


Commas: 19712/19683, 32805/32768, 1771561/1769472
[[Optimal tuning]]s:  
* [[WE]]: ~121/96 = 400.0154{{c}}, ~1331/768 = 950.9883{{c}}
* [[CWE]]: ~121/96 = 400.0000{{c}}, ~1331/768 = 950.9685{{c}}


POTE generators:
{{Optimal ET sequence|legend=1| 9, 15, 24, 87, 111, 135, 159, 1407, 1566, 1725e, 1884e, 2043e, 2202e, 2361e, 2520e, 2679e }}


Map:  
[[Badness]] (Sintel): 0.127


Wedgie:  
=== Triblet ===
Subgroup: 2.3.11.13


EDOs:  
Comma list: 352/351, 1771561/1769472


Badness:
Subgroup-val mapping: {{mapping| 3 0 8 23 | 0 2 1 -5 }}


== Tribilo ==
Optimal tunings:
* WE: ~121/96 = 399.8965{{c}}, ~1331/768 = 951.2352{{c}}
* CWE: ~121/96 = 400.0000{{c}}, ~1331/768 = 951.4779{{c}}


Tribilo is the pure Rank-2 2.3.11 temperament that tempers out the nexus comma – its name comes from the nexus comma being referred to as the "tribilo comma" in [[color notation]].
{{Optimal ET sequence|legend=0| 9f, 15f, 24, 63, 87, 111, 198, 309f, 507f }}


Subgroup: 2.3.11
Badness (Sintel): 0.613


Comma list: 1771561/1769472
=== Trilobite ===
Subgroup: 2.3.11.13


Mapping:  
Comma list: 85293/85184, 1771561/1769472


Wedgie:  
Subgroup-val mapping: {{mapping| 3 0 8 42 | 0 2 1 -13 }}


POTE generator:  
Optimal tunings:  
* WE: ~121/96 = 400.0489{{c}}, ~1331/768 = 950.8972{{c}}
* CWE: ~121/96 = 400.0000{{c}}, ~1331/768 = 951.7766{{c}}


Vals:
{{Optimal ET sequence|legend=0| 24, 111f, 135f, 159, 183, 390, 573, 963f, 1536bef }}


Badness:
Badness (Sintel): 0.724


[[Category:Regular temperament theory]]
[[Category:Commatic realms]]
[[Category:Commatic realm]]
[[Category:The Nexus| ]] <!-- main article -->
[[Category:Nexus]]
[[Category:Nexus]]
Retrieved from "https://en.xen.wiki/w/The_Nexus"