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|)/|| }} | |{{sagittal|)/|| }} | ||
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|{{sagittal|(|| ~}} | |{{sagittal|(||~}} | ||
|{{sagittal|~~|| }} | |{{sagittal|~~|| }} | ||
|{{sagittal|||~}} | |{{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 | ||