Erac: Difference between revisions
From Xenharmonic Reference
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| {{problematic}}
| | #redirect [[Straddle primes]] |
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| '''Eracs''', short for error accidentals, are symbols that denote error cancelation in a subgroup. This is especially important in the context of [[Straddle primes]].
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| {| class="wikitable"
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| |+Erac Meanings
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| |-
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| |<
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| |Flat by a set arbitrary amount.
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| |-
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| |<>
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| |Critically flat/sharp.
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| |-
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| |>
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| |Sharp by a set arbitrary amount.
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| |}
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| Eracs can be placed before or after a number, although it is preferred in ratios for the denominator to have the erac adjacent to the slash. Eracs on the denominator have an inverse effect on the size of a tempered ratio.
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| For example, 37edo could be called 2.<<3.>3.5.7.11.13, such that adding the flat 3 and two sharp 3s results in a good 27.
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| See also: erac temperament optimization [[https://spoogly.website/tools/gto.html]]
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| [[index.php?title=Category:Atypical ratios]]
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Latest revision as of 16:02, 6 March 2026
