Sagittal notation: Difference between revisions

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added a prime approximation table, among other things and fixed some errors
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|{{sagittal|(|| ~}}
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=== Spartan ===
=== Spartan ===
It is the simplest and coarsest of the Sagittal sets. The Spartan set has a maximum resolution of 13EDA<ref>https://forum.sagittal.org/viewtopic.php?t=516</ref>, which is ''sufficient'' to notate 13*-limit just intonation (if used for JI), and all EDOs which are at most sharp-13, including all EDOs from 1 up to and including 111, the [[Zeta peak edo|zeta peaks]] [[130edo|130]], [[142edo|142]], among many others. If used with tempered systems, it can be used to write music in the 23-limit, such as with 94edo.
It is the simplest and coarsest of the Sagittal sets. The Spartan set has a maximum resolution of 13EDA<ref>https://forum.sagittal.org/viewtopic.php?t=516</ref>, which is ''sufficient'' to notate 13*-limit just intonation (if used for JI), and all EDOs which are at most sharp-13, including all EDOs from 1 up to and including 111, the [[Zeta peak edo|zeta peaks]] [[130edo|130]], [[142edo|142]], among many others. If used with tempered systems, it can be used to write music in the 23-limit, such as with [[94edo]].


<nowiki>*</nowiki>In this set, ratios of 13 are represented by reusing the accidentals for ratios of 35 (7*5). This is because the resulting interval, [[512/315]] (the ~13/8 interval) is only 0.4 ¢ ([[4096/4095]]) from just. The prime 13 will not have a distinct accidental up until the Olympian set.
<nowiki>*</nowiki>In this set, ratios of 13 are represented by reusing the accidentals for ratios of 35 (7*5). This is because the resulting interval, [[512/315]] (the ~13/8 interval) is only 0.4 ¢ ([[4096/4095]]) from just. The prime 13 will not have a distinct accidental up until the Olympian set.
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It is a handy symbol set, adding 10 symbol pairs to Spartan, with a total of 23 symbol pairs*, allowing for a maximum resolution of 21EDA. Early in the design of the Sagittal notation system, Secor and Keenan found that by extending the Spartan set with a further five pairs of single-shaft accidentals [[Sagittal notation#Athenian extension single-shaft|shown below]] an economical universal JI notation system could be defined, by dividing the apotome (Pythagorean sharp or flat) into 21 almost-equal divisions. This set of thirteen pairs is called the Athenian set. If the divisions were made exactly equal (5.4136 ¢), this would be an example of [[Brahmagupta]] temperament, of which the two most salient EDOs are [[217edo|217]] and [[224edo|224]].
It is a handy symbol set, adding 10 symbol pairs to Spartan, with a total of 23 symbol pairs*, allowing for a maximum resolution of 21EDA. Early in the design of the Sagittal notation system, Secor and Keenan found that by extending the Spartan set with a further five pairs of single-shaft accidentals [[Sagittal notation#Athenian extension single-shaft|shown below]] an economical universal JI notation system could be defined, by dividing the apotome (Pythagorean sharp or flat) into 21 almost-equal divisions. This set of thirteen pairs is called the Athenian set. If the divisions were made exactly equal (5.4136 ¢), this would be an example of [[Brahmagupta]] temperament, of which the two most salient EDOs are [[217edo|217]] and [[224edo|224]].


When used for JI, it defines the ''Standard Medium Precision JI,'' capable of writing in the 17-limit.
When used for JI, it defines the ''Standard Medium Precision JI,'' capable of writing in the [[17-limit]]. In tempered systems, it can be used to write music in the [[31-limit]], such as with 217edo.


<nowiki>*</nowiki>There are two symbol pairs that are interchangeable in this level of precision<ref>https://sagittal.org/sagittal.pdf p.10</ref>, these being  {{sagittal|(|}} {{sagittal|(!}} / {{sagittal||\}} {{sagittal|!/}}  and  {{sagittal|)||~}} {{sagittal|)!!~}} / {{sagittal|/||}} {{sagittal|\!!}} . They will not become distinct until the next level of precision.
<nowiki>*</nowiki>There are two symbol pairs that are interchangeable in this level of precision<ref>https://sagittal.org/sagittal.pdf p.10</ref>, these being  {{sagittal|(|}} {{sagittal|(!}} / {{sagittal||\}} {{sagittal|!/}}  and  {{sagittal|)||~}} {{sagittal|)!!~}} / {{sagittal|/||}} {{sagittal|\!!}} . They will not become distinct until the next level of precision.
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=== Promethean ===
=== Promethean ===
It adds 20 more symbols to Athenian symbol set, allowing for a maximum resolution of 47EDA. When used for JI, it defines the ''Standard High Precision JI'' capable of writing in the 23-limit, however, this JI notation is not recommended. It instead can be used to write in EDOs such as the [[Zeta peak edo|zeta edos]] [[270edo|270]] and [[311edo|311]].
It adds 20 more symbols to Athenian symbol set, allowing for a maximum resolution of 47EDA. When used for JI, it defines the ''Standard High Precision JI'' capable of writing in the 23-limit, however, this JI notation is not recommended. It instead can be used to write in EDOs such as the [[Zeta peak edo|zeta edos]] [[270edo|270]] and [[311edo|311]], the latter to write music in the [[41-limit]].


=== Herculean ===
=== Herculean ===
It adds the [[schisma]] diacritic to the Promethean symbol set, which can be stacked with the remaining alterations, allowing for a maximum resolution of 58EDA. When used for JI, it defines the ''Standard Ultra Precision JI'' capable of writing in the 23-limit with higher precision.
It adds the [[schisma]] diacritic to the Promethean symbol set, which can be stacked with the remaining alterations, allowing for a maximum resolution of 58EDA, of which a great edo is [[612edo|612]]. When used for JI, it defines the ''Standard Ultra Precision JI'' capable of writing in the 23-limit with higher precision.


=== Olympian ===
=== Olympian ===
It adds the [[4096/4095|''mina'']] diacritic to the Herculean symbol set, able to be stacked up to twice with the schisma and the remaining alterations, allowing for a maximum resolution of 233EDA. When used for JI, it defines the ''Standard Extreme Precision JI'' capable of writing in the 47-limit with great precision. It also is the smallest precision level that has an "exact" mapping for prime 13, thanks to the mina's appearance. 13/8 is now written as a major sixth minus the 35 large diesis and a mina. From C, this would be C - A{{sagittal|,}}{{sagittal|(!/}} .
It adds the [[4096/4095|''mina'']] diacritic to the Herculean symbol set, able to be stacked up to twice with the schisma and the remaining alterations, allowing for a maximum resolution of 233EDA, The zeta peak [[2460edo]] has been used as a base to define the mina as an interval measure, and the Olympian set of intervals generally, due to its extremely precise 27-odd-limit palette. When used for JI, it defines the ''Standard Extreme Precision JI'' capable of writing in the [[47-limit]] with great precision. It also is the smallest precision level that has an "exact" mapping for prime 13, thanks to the mina's appearance. 13/8 is now written as a major sixth minus the 35 large diesis and a mina. From C, this would be C - A{{sagittal|,}}{{sagittal|(!/}} .


=== Magrathean ===
=== Magrathean ===
It adds the ''tina'' diacritic to the Olympian symbol set, able to be stacked up to thrice with any of the symbols (three tinas make a ~mina), allowing for a whopping maximum resolution of 809EDA. When used for JI, it defines the ''Standard Insane Precision JI'' capable of writing in the 127-limit with astonishing precision. There is no level of precision higher than this, and it is unlikely that one will ever exist. Unless you want some hot sauce.<ref name=":0">https://forum.sagittal.org/viewtopic.php?p=2714&hilit=bomb#p2714  "A tina is approximately 1/809th of an apotome, 1/8539th of an octave (a [[Zeta peak edo|zeta-peak EDO]]), or 0.14 cents. The fractional-tina is generally half a tina but is intentionally arbitrary, because if you need any more precision than that, I have a bottle of Da' Bomb Beyond Insanity Hot Sauce with your name on it"</ref>
It adds the ''tina'' diacritic to the Olympian symbol set, able to be stacked up to thrice with any of the symbols (three tinas make a ~mina), allowing for a whopping maximum resolution of 809EDA. The strict zeta peak [[8539edo]] has been used to define the tina as an interval measure, due its insanely precise 27-odd-limit (and beyond) interval palette. When used for JI, it defines the ''Standard Insane Precision JI'' capable of writing in the 127-limit with astonishing precision. There is no level of precision higher than this, and it is unlikely that one will ever exist. Unless you want some hot sauce.<ref name=":0">https://forum.sagittal.org/viewtopic.php?p=2714&hilit=bomb#p2714  "A tina is approximately 1/809th of an apotome, 1/8539th of an octave (a [[Zeta peak edo|zeta-peak EDO]]), or 0.14 cents. The fractional-tina is generally half a tina but is intentionally arbitrary, because if you need any more precision than that, I have a bottle of Da' Bomb Beyond Insanity Hot Sauce with your name on it"</ref>


== Prime approximations ==
== Prime approximations ==
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|-
|-
|Spartan
|Spartan
| rowspan="5" |F{{sagittal|||\}}
| rowspan="5" |F {{sagittal|||\}}
| rowspan="5" |C{{sagittal|!)}}
| rowspan="5" |C {{sagittal|!)}}
| rowspan="5" |G{{sagittal|/|\}}
| rowspan="5" |G {{sagittal|/|\}}
| rowspan="3" |B{{sagittal|\!)}}(0.42)
| rowspan="3" |B {{sagittal|\!)}}(0.42)
|D{{sagittal|)||| }} (2.971)
|D {{sagittal|)||| }} (2.971)
| rowspan="2" |F{{sagittal||(}} (2.380)
| rowspan="2" |F {{sagittal||(}} (2.380)
|A{{sagittal|\\!}} (3.008)
|A {{sagittal|\\!}} (3.008)
|C{{sagittal||)}} (6.223)
|C {{sagittal||)}} (6.223)
| rowspan="2" |D{{sagittal|\!/}}(1.691)
| rowspan="2" |D {{sagittal|\!/}}(1.691)
|-
|-
|Athenian
|Athenian
| rowspan="4" |E{{sagittal|(!!(}}
| rowspan="4" |E {{sagittal|(!!(}}
|A{{sagittal|~!!(}}(1.009)
|A {{sagittal|~!!(}}(1.009)
| rowspan="2" |C{{sagittal|(| }} (0.339)
| rowspan="2" |C {{sagittal|(| }} (0.339)
|-
|-
|Promethean
|Promethean
| rowspan="3" |F{{sagittal|)| }}
| rowspan="3" |F {{sagittal|)| }}
| rowspan="3" |A{{sagittal|)~!!}}
| rowspan="3" |A {{sagittal|)~!!}}
|D{{sagittal|(\!}}(0.436)
|D {{sagittal|(\!}}(0.436)
|-
|-
|Olympian
|Olympian
| rowspan="2" |B{{sagittal|,}}{{sagittal|\!)}}
| rowspan="2" |B {{sagittal|,}}{{sagittal|\!)}}
|C {{sagittal|`}}{{sagittal|(| }} (0.130)
|C {{sagittal|`}}{{sagittal|(| }} (0.130)
| rowspan="2" |D{{sagittal|,}}{{sagittal|(\!}} (0.013)
| rowspan="2" |D {{sagittal|,}}{{sagittal|(\!}} (0.013)
|-
|-
|Magrathean
|Magrathean