5L 3s/Temperaments: Difference between revisions

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[[Oneirotonic]] temperaments have a sort of analogy to diatonic temperaments superpyth and meantone in how they treat the large step. In diatonic the large step approximates 9/8 (a very good 9/8 in 12edo), but superpyth has 9/8 ~ 8/7, and meantone has 9/8 ~ 10/9. In oneirotonic the large step tends to approximate 10/9 (and is a very good 10/9 in 13edo which is the oneirotonic analogue to 12edo), but different oneiro temperaments do different things with it. In A-Team (13&18), 10/9 is equated with 9/8, making the major oneirothird a 5/4 (thus is "meantone" in that sense). In both Petrtri (13&21) and Tridec (21&29), 10/9 is equated with 11/10, making the major oneirothird a 11/9; and the perfect oneirofourth is equated to 13/10. So the compressed major triad add2 (R-M2-M3-M5, M5 = major oneirofifth = minor fifth in 13edo) is interpreted as 9:10:11:13 in petrtri, analogous to meantone's 8:9:10:12. Thus Petrtri and Tridec are the same temperament when you only care about the 9:10:11:13, or equivalently the 2.9/5.11/5.13/5 subgroup. This is one reason why Tridec can be viewed as the oneirotonic analogue of [[flattone]]:  it's a flatter variant of the flat-of-13edo oneiro temperament on the 2.9/5.11/5.13/5 subgroup.
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[[Oneirotonic]] temperaments have a sort of analogy to diatonic temperaments superpyth and meantone in how they treat the large step. In diatonic the large step approximates 9/8 (a very good 9/8 in 12edo), but [[superpyth]] has {{nowrap|9/8 ~ 8/7}}, and meantone has {{nowrap|9/8 ~ 10/9}}. In oneirotonic the large step tends to approximate 10/9 (and is a very good 10/9 in 13edo which is the oneirotonic analogue to 12edo), but different oneiro temperaments do different things with it. In A-Team ({{nowrap|13 & 18}}), 10/9 is equated with 9/8, making the major oneirothird a 5/4 (thus is "meantone" in that sense). In both Petrtri ({{nowrap|13 & 21}}) and Tridec ({{nowrap|21 & 29}}), 10/9 is equated with 11/10, making the major oneirothird a 11/9; and the perfect oneirofourth is equated to 13/10. So the compressed major triad add2 (R–M2–M3–M5, {{nowrap|M5 {{=}} major oneirofifth}} {{nowrap|{{=}} minor fifth in 13edo}}) is interpreted as 9:10:11:13 in petrtri, analogous to meantone's 8:9:10:12. Thus Petrtri and Tridec are the same temperament when you only care about the 9:10:11:13, or equivalently the 2.9/5.11/5.13/5 subgroup. This is one reason why Tridec can be viewed as the oneirotonic analogue of [[flattone]]—it's a flatter variant of the flat-of-13edo oneiro temperament on the 2.9/5.11/5.13/5 subgroup.
 
Vulture/[[Hemifamity temperaments|Buzzard]], in which four generators make a 3/1 (and three generators approximate an octave plus 8/7), is the only [[harmonic entropy]] minimum in the oneirotonic range. However, the rest of this region is still rich in notable subgroup temperaments.


Vulture/[[Hemifamity_temperaments|Buzzard]], in which four generators make a 3/1 (and three generators approximate an octave plus 8/7), is the only [[harmonic entropy]] minimum in the oneirotonic range. However, the rest of this region is still rich in notable subgroup temperaments.
== Petrtri ==
== Petrtri ==
Subgroup: 2.11/5.13/5
Subgroup: 2.11/5.13/5
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Mapping: [<1 0 1|, <0 3 1|]
Mapping: [<1 0 1|, <0 3 1|]


EDOs: 21, 29, 153, 182, 211, 240, 269, 298, 327, 356, 385, 509, 741c, 1126c
EDOs: {{EDOs|21, 29, 153, 182, 211, 240, 269, 298, 327, 356, 385, 509, 741c, 1126c}}


=== Tridec ===
=== Tridec ===
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Mapping generators: ~2, ~13/10
Mapping generators: ~2, ~13/10


{{Vals|legend=1| 21, 29, 37 }}
{{Optimal ET sequence|legend=1| 21, 29, 37 }}


==== Intervals ====
==== Intervals ====
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! Size in POTE tuning
! Size in POTE tuning
! Note name on Q
! Note name on Q
! class="unsortable"| Approximate ratios
! class="unsortable" | Approximate ratios
! #Gens up
! #Gens up
|-
|-
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Mapping generators: ~2, ~13/10
Mapping generators: ~2, ~13/10


{{Vals|legend=1| 13, 21, 34 }}
{{Optimal ET sequence|legend=1| 13, 21, 34 }}


==== Intervals ====
==== Intervals ====
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! Size in POTE tuning
! Size in POTE tuning
! Note name on Q
! Note name on Q
! class="unsortable"| Approximate ratios
! class="unsortable" | Approximate ratios
! #Gens up
! #Gens up
|-
|-
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Mapping generators: ~2, ~21/16
Mapping generators: ~2, ~21/16


{{Vals|legend=1| 13, 18, 31, 44 }}
{{Optimal ET sequence|legend=1| 13, 18, 31, 44 }}


=== Intervals ===
=== Intervals ===
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! Size in 31edo
! Size in 31edo
! Note name on Q
! Note name on Q
! class="unsortable"| Approximate ratios<ref>The ratio interpretations that are not valid for 18edo are italicized.</ref>
! class="unsortable" | Approximate ratios*
! #Gens up
! #Gens up
|-
|-
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| +5
| +5
|}
|}
<references/>
<nowiki />* The ratio interpretations that are not valid for 18edo are italicized.


== Buzzard ==
== Buzzard ==
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Mapping generators: ~2, ~21/16  
Mapping generators: ~2, ~21/16  


Wedgie: &lt;&lt;4 21 -3 24 -16 -66||
{{Optimal ET sequence|legend=1| 48, 53, 111, 164d, 275d}}
 
[[Val]]s: {{Vals| 48, 53, 111, 164d, 275d}}


Badness: 0.0480
Badness: 0.0480
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! Size in POTE tuning
! Size in POTE tuning
! Note name on Q
! Note name on Q
! class="unsortable"| Approximate ratios
! class="unsortable" | Approximate ratios
! #Gens up
! #Gens up
|-
|-