User:Ganaram inukshuk/5L 2s: Difference between revisions
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The step ratios shown above form a continuum of step ratios. The section Tuning spectrum shows how this is made, as well as a larger spectrum. | The step ratios shown above form a continuum of step ratios. The section Tuning spectrum shows how this is made, as well as a larger spectrum. | ||
== | ===Rank-2 temperament interpretations=== | ||
: ''Main article: [[5L 2s/Temperaments]]'' | : ''Main article: [[5L 2s/Temperaments]]'' | ||
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5L 2s has several rank-2 temperament interpretations, such as: | 5L 2s has several rank-2 temperament interpretations, such as: | ||
* [[Meantone]], with generators around 696.2¢. | * [[Meantone]], with generators around 696.2¢. This includes: | ||
** [[Flattone]], with generators around 693.7¢ | ** [[Flattone]], with generators around 693.7¢. | ||
*[[Schismic]], with generators around 702¢ | *[[Schismic]], with generators around 702¢. | ||
*[[Parapyth]], with generators around 704.7¢ | *[[Parapyth]], with generators around 704.7¢. | ||
*[[Archy]], with generators around 709.3¢. | *[[Archy]], with generators around 709.3¢. This includes: | ||
**Supra, with generators around 707.2¢ | **Supra, with generators around 707.2¢ | ||
**Superpyth, with generators around 710.3¢ | **Superpyth, with generators around 710.3¢ | ||
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== Step ratio ranges== | == Step ratio ranges== | ||
=== Simple step ratios === | === Simple step ratios === | ||
17edo and 19edo, produced using step ratios of 3:1 and 3:2 respectively, are the smallest edos that offer a greater variety of pitches than 12edo. Note that any enharmonic equivalences that 12edo has no longer hold for either 17edo or 19edo, as shown in the table below.{{MOS degrees|Scale Signature=5L 2s|Step Ratio=2/1; 3/1; 3/2|Genchain Extend=7}} | 17edo and 19edo, produced using step ratios of 3:1 and 3:2 respectively, are the smallest edos that offer a greater variety of pitches than 12edo. Note that any enharmonic equivalences that 12edo has no longer hold for either 17edo or 19edo, as shown in the table below.{{MOS degrees|Scale Signature=5L 2s|Step Ratio=2/1; 3/1; 3/2|Genchain Extend=7}} | ||
=== | === Parasoft step ratios === | ||
:''Main article: [[ | :''Main article: [[Flattone]]'' | ||
Parasoft step ratios (4:3 and 3:2) correspond to flattone temperaments, characterized by flattened perfect 5ths (flat of 702¢) to produce major 3rds that are flatter than 5/4 (386¢).{{MOS degrees|Scale Signature=5L 2s|Step Ratio=3/2; 4/3; 7/5; 10/7|Genchain Extend=0, 5}} | |||
===Hyposoft step ratios=== | |||
:''Main article: [[Meantone]]'' | |||
Hyposoft step ratios (3:2 to 2:1) correspond to meantone temperaments, characterized by flattened perfect 5ths (flat of 702¢) to produce diatonic major 3rds that approximate 5/4 (386¢).{{MOS degrees|Scale Signature=5L 2s|Step Ratio=3/2; 5/3; 7/4; 8/5|Genchain Extend=0, 5}} | |||
===Hypohard step ratios === | |||
:''Main article: [[Pythagorean tuning]] and [[Schismatic family#Schismatic aka Helmholtz|schismatic temperament]]'' | |||
The range of hypohard step ratios can be divided into a minihard range (between 2:1 to 5:2) and quasihard range (between 5:2 to 3:1). | |||
==== Minihard step ratios ==== | |||
Minihard step ratios correspond to Pythagorean tuning and schismatic temperament, characterized by having a perfect 5th that is as close to just (701.96¢) as possible, resulting in a major 3rd of 81/64 (407¢).{{MOS degrees|Scale Signature=5L 2s|Step Ratio=7/3; 9/4|Genchain Extend=0, 5}} | |||
==== Quasihard step ratios ==== | |||
Quasihard step ratios correspond to "neogothic" or "parapyth" systems whose perfect 5th is sharper than just, resulting in major 3rds that are sharper than 81/64. | |||
17edo is considered to be on the sharper end of the neogothic spectrum, with a major 3rd that is more discordant than flatter neogothic tunings.{{MOS degrees|Scale Signature=5L 2s|Step Ratio=3/1; 5/2; 8/3|Genchain Extend=0, 5}} | |||
{{MOS degrees|Scale Signature=5L 2s|Step Ratio=3/ | ===Parahard and ultrahard step ratios=== | ||
:''Main article: [[Archy]]'' | |||
The parahard and ultrahard ranges (3:1 to 1:1) correspond to archy systems, with perfect 5ths that are significantly sharper than than 702¢.{{MOS degrees|Scale Signature=5L 2s|Step Ratio=3/1; 4/1; 5/1; 6/1|Genchain Extend=0, 5}} | |||
=== | |||
:''Main article: | |||
The | |||
== Modes== | == Modes== | ||
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{{SB tree|Depth=3}} | {{SB tree|Depth=3}} | ||
This process can be repeated to produce a finer continuum of step ratios as shown below, with each ratio producing a different edo.{{Scale tree|5L 2s|depth=6|Comments=7/5:[[Flattone]] is in this region;21/13:[[Golden meantone]] (696.2145¢);5/3:[[Meantone]] is in this region;2/1:(Generators smaller than this are proper);9/4:The generator closest to a just [[3/2]] for EDOs less than 200;16/7:[[Garibaldi]] / [[Cassandra]];21/8:Golden neogothic (704.0956¢);8/3:[[Neogothic]] is in this region;4/1:[[Archy]] is in this region|tuning=5L 2s}} | This process can be repeated to produce a finer, larger continuum of step ratios as shown below, with each ratio producing a different edo.{{Scale tree|5L 2s|depth=6|Comments=7/5:[[Flattone]] is in this region;21/13:[[Golden meantone]] (696.2145¢);5/3:[[Meantone]] is in this region;2/1:(Generators smaller than this are proper);9/4:The generator closest to a just [[3/2]] for EDOs less than 200;16/7:[[Garibaldi]] / [[Cassandra]];21/8:Golden neogothic (704.0956¢);8/3:[[Neogothic]] is in this region;4/1:[[Archy]] is in this region|tuning=5L 2s}} | ||
==See also== | ==See also== | ||
*[[Diatonic functional harmony]] | *[[Diatonic functional harmony]] |