16ed5/3: Difference between revisions

Ayceman (talk | contribs)
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More comma stuff
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== Commas ==
Depending on your mapping, 16ed5/3 can be said to temper a number of commas, including the diaschisma, the marvel comma, Archytas' comma, and the jubilisma, all discussed in the temperaments section. In addition, being an even division of the 5/3, it tempers the sensamagic comma ([[245/243]]), as the half mosoctave is midway between [[9/7]] and [[35/27]]. This is analogous to the tritone in 2n edo systems. The keema ([[875/864]]) is tempered due to the septimal interpretation of the diatonic sevenths, and the Motwellsma ([[99/98]]) is tempered by two major mos3rds ([[7/6]]) resulting in an augmented mos5th ([[11/8]]).


== Temperaments ==
== Temperaments ==
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The tempered marvel comma also means that the two large [[Tritone|tritones]] ([[64/45|pental]] and [[10/7|septimal]]) are addressed by the same scale step. The tempered diaschisma, on the other hand, means that both pental tritones are also addressed by the same scale step.
The tempered marvel comma also means that the two large [[Tritone|tritones]] ([[64/45|pental]] and [[10/7|septimal]]) are addressed by the same scale step. The tempered diaschisma, on the other hand, means that both pental tritones are also addressed by the same scale step.


As 3 semitones make a period-reduced octave, and it alludes to the tritone tempering, [[User:Ayceman|I]] propose the name '''tristone''' for the basic [[Diaschismic family|diaschismic temperament]], based on the 16/15 to 6/5 relationship, as well as the following variants and extensions:
Both of the 7-limit approaches also temper Archytas' comma ([[64/63]]) as a result of equating the [[14/9]] with [[7/4]], and the jubilisma ([[50/49]]) due to tritone equivalence. These are relatively large commas, given the step size (about half, and 7/11ths respectively).
 
This shows the close relationships with [[Srutal]] and [[Pajara]] octave temperaments. In 16ed5/3's case, there is a close equivalence to [[22edo]]'s pajara tuning.
 
As 3 semitones make a period-reduced octave, and it alludes to tritone tempering, [[User:Ayceman|I]] propose the name '''tristone''' for the basic [[Diaschismic family|diaschismic temperament]], based on the 16/15 to 6/5 relationship, as well as the following variants and extensions:


=== Tristone ===
=== Tristone ===
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[[Subgroup]]: 5/3.20/9.10/3.1000/189
[[Subgroup]]: 5/3.20/9.10/3.1000/189


[[Comma]] list: 2048/2025, 225/224
[[Comma]] list: 2048/2025, 225/224, 64/63, 50/49


[[POL2]] generator: ~5/4 = 389.6140
[[POL2]] generator: ~5/4 = 389.6140
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[[Subgroup]]: 5/3.20/9.5/2.250/63
[[Subgroup]]: 5/3.20/9.5/2.250/63


[[Comma]] list: 2048/2025, 225/224
[[Comma]] list: 2048/2025, 225/224, 64/63, 50/49


[[POL2]] generator: ~5/4 = 390.5430
[[POL2]] generator: ~5/4 = 390.5430