27/26: Difference between revisions

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m no need to keep it in the less specific categoty
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{{Infobox Interval
{{Infobox Interval
| Icon =
| Ratio = 27/26
| Ratio = 27/26
| Monzo = -1 3 0 0 0 -1
| Monzo = -1 3 0 0 0 -1
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}}
}}


In [[13-limit]] [[just intonation]], '''27/26''', the '''small tridecimal third tone''', appears as the interval between the Pythagorean major sixth of [[27/16]] and the thirteenth harmonic of [[13/8]]. It measures about 65.3¢. It is close in size to another 13-limit microtone – [[26/25]]. These intervals differ by the [[superparticular]] ratio 676/675, about 2.6¢, the island comma; tempering it out produces temperaments associated with [[The Archipelago]].
In [[13-limit]] [[just intonation]], '''27/26''', the '''small tridecimal third tone''', appears as the interval between the Pythagorean major sixth of [[27/16]] and the thirteenth harmonic of [[13/8]]. It measures about 65.3¢. It is close in size to another 13-limit microtone – [[26/25]]. These intervals differ by the [[superparticular]] ratio [[676/675]], about 2.6¢, the island comma; tempering it out produces temperaments associated with [[The Archipelago]].


27/26 is significant in [[Helmholtz-Ellis notation]] as the tridecimal formal comma which translates a Pythagorean interval to a nearby tridecimal interval, analogous to [[64/63]] and [[33/32]] for septimal and undecimal, respectively. However, in [[Functional Just System]], that role is taken by [[1053/1024]].
27/26 is significant in [[Helmholtz-Ellis notation]] as the tridecimal formal comma which translates a Pythagorean interval to a nearby tridecimal interval, analogous to [[64/63]] and [[33/32]] for septimal and undecimal, respectively. However, in [[Functional Just System]], that role is taken by [[1053/1024]].
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[[Category:13-limit]]
[[Category:13-limit]]
[[Category:Interval ratio]]
[[Category:Chroma]]
[[Category:Unison]]
[[Category:Third tone]]
[[Category:Third tone]]
[[Category:Medium comma]]
[[Category:Medium comma]]
[[Category:Superparticular]]
[[Category:Superparticular]]
[[Category:Listen]]
[[Category:Pages with internal sound examples]]

Revision as of 11:29, 15 December 2021

Interval information
Ratio 27/26
Factorization 2-1 × 33 × 13-1
Monzo [-1 3 0 0 0 -1
Size in cents 65.33734¢
Name small tridecimal third tone
Color name 3u1, thu unison
FJS name [math]\displaystyle{ \text{A1}_{13} }[/math]
Special properties superparticular,
reduced
Tenney height (log2 nd) 9.45533
Weil height (log2 max(n, d)) 9.50978
Wilson height (sopfr(nd)) 24

[sound info]
Open this interval in xen-calc

In 13-limit just intonation, 27/26, the small tridecimal third tone, appears as the interval between the Pythagorean major sixth of 27/16 and the thirteenth harmonic of 13/8. It measures about 65.3¢. It is close in size to another 13-limit microtone – 26/25. These intervals differ by the superparticular ratio 676/675, about 2.6¢, the island comma; tempering it out produces temperaments associated with The Archipelago.

27/26 is significant in Helmholtz-Ellis notation as the tridecimal formal comma which translates a Pythagorean interval to a nearby tridecimal interval, analogous to 64/63 and 33/32 for septimal and undecimal, respectively. However, in Functional Just System, that role is taken by 1053/1024.

See also