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| '''Petrtri''' is an [[oneirotonic]]-based temperament or harmonic framework, based on the oneirotonic [[MOS]] with period 1\1 and a generator chain with generator a subfourth between 21edo's 8\21 (457.14¢) and 13edo's 5\13 (461.54¢).
| | #redirect [[Subgroup temperaments#Petrtri]] |
| == Notation==
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| The notation used in this article is described in [[5L 3s#Notation]].
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| == Temperament data ==
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| === Intervals ===
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| Sortable table of intervals in the Dylathian mode and their Petrtri interpretations:
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| {| class="wikitable right-2 right-3 right-4 right-5 sortable"
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| |-
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| ! Degree
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| ! Size in 13edo
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| ! Size in 21edo
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| ! Size in 34edo
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| ! Size in POTE tuning
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| ! Note name on Q
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| ! class="unsortable"| Approximate ratios
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| ! #Gens up
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| |-
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| | 1
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| | 0\13, 0.00
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| | 0\21, 0.00
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| | 0\34, 0.00
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| | 0.00
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| | Q
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| | 1/1
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| | 0
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| |-
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| | 2
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| | 2\13, 184.62
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| | 3\21, 171.43
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| | 5\34, 176.47
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| | 177.45
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| | J
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| | 10/9, 11/10
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| | +3
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| |-
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| | 3
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| | 4\13, 369.23
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| | 6\21, 342.86
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| | 10\34, 352.94
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| | 354.90
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| | K
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| | 11/9, 16/13
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| | +6
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| |-
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| | 4
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| | 5\13, 461.54
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| | 8\21, 457.14
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| | 13\34, 458.82
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| | 459.15
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| | L
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| | 13/10, 17/13, 22/17
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| | +1
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| |-
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| | 5
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| | 7\13, 646.15
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| | 11\21, 628.57
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| | 18\34, 635.294
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| | 636.60
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| | M
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| | 13/9, 16/11, 23/16 (esp. 21edo)
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| | +4
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| |-
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| | 6
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| | 9\13, 830.77
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| | 14\21, 800.00
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| | 23\34, 811.77
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| | 814.05
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| | N
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| | 8/5
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| | +7
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| |-
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| | 7
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| | 10\13, 923.08
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| | 16\21, 914.29
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| | 26\34, 917.65
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| | 918.30
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| | O
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| | 17/10
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| | +2
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| |-
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| | 8
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| | 12\13, 1107.69
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| | 19\21, 1085.71
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| | 31\34, 1094.12
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| | 1095.75
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| | P
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| | 17/9, 32/17, 15/8
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| | +5
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| |}
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| == Basic theory ==
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| == Primodal theory ==
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| === Primodal chords ===
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| === Nejis ===
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| ==== 21nejis ====
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| # 128:132:137:141:146:151:156:161:166:172:178:184:190:197:204:210:217:224:232:240:248:256
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| [[Category:Oneirotonic]]
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| [[Category:Temperament]]
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| [[Category:Petrtri|*]]
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