Limmic temperaments: Difference between revisions
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'''Limmic temperaments''' are [[temperament]]s that [[temper out]] the Pythagorean limma, [[256/243]]. As a consequence, [[3/2]] is always represented by 3 | '''Limmic temperaments''' are [[temperament]]s that [[temper out]] the Pythagorean limma, [[256/243]]. As a consequence, [[3/2]] is always represented by 3\5, 720 [[cent]]s assuming pure octaves. While quite sharp, this is close enough to a just fifth to serve as a fifth, and some people are fond of it. | ||
== Blackwood == | == Blackwood == | ||
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Blackwood is the 5edo [[circle of fifths]] with an independent dimension for the harmonic 5. It can be described as the {{nowrap| 5 & 10 }} temperament. [[15edo]] is an obvious tuning. | Blackwood is the 5edo [[circle of fifths]] with an independent dimension for the harmonic 5. It can be described as the {{nowrap| 5 & 10 }} temperament. [[15edo]] is an obvious tuning. | ||
The only extension to the 7-limit that makes any sense is to map the [[7/4|harmonic seventh]] to 4 | The only extension to the 7-limit that makes any sense is to map the [[7/4|harmonic seventh]] to 4\5, tempering out [[28/27]], [[49/48]], and [[64/63]]. This is known as ''blacksmith'' in earlier materials, including [[Graham Breed]]'s temperament finder. | ||
=== 5-limit === | === 5-limit === | ||
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{{Mapping|legend=1| 5 8 0 | 0 0 1 }} | {{Mapping|legend=1| 5 8 0 | 0 0 1 }} | ||
: | : mapping generators: ~9/8, ~5 | ||
[[Optimal tuning]]s: | [[Optimal tuning]]s: | ||
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== Blackweed == | == Blackweed == | ||
Blackweed is a variant of blackwood as it tempers out 256/243 alike but in the 2.3.11/7 [[subgroup]]. 20edo is close to the optimum, which has 4 | Blackweed is a variant of blackwood as it tempers out 256/243 alike but in the 2.3.11/7 [[subgroup]]. 20edo is close to the optimum, which has 4\20 as the period and 420¢ as the generator. | ||
[[Subgroup]]: 2.3.11/7 | [[Subgroup]]: 2.3.11/7 |