245/242: Difference between revisions

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Fix temperament reference. Add ratio, monzo and link to small commas.
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{{Infobox Interval
{{Infobox Interval
| Ratio = 245/242
| Cents = 21.329642
| Monzo = -1 0 1 2 -2
| Name = frostma
| Name = frostma
| Color name = luuzzy2, luluzozoyo 2nd
| Comma = yes
}}
}}
The '''frostma''' ([[ratio]]: 245/242, [[monzo]]: {{monzo| -1 0 1 2 -2 }}) is a [[small comma|small]] [[11-limit]] [[comma]] named after [[User:Frostburn|Frostburn]] used in the construction of the [[No-threes subgroup temperaments #Frostburn|frostburn]] temperament.
'''245/242''', the '''frostma''', is a [[small comma|small]] [[11-limit]] [[comma]] measuring about 21.3 [[cent]]s. It is the amount by which [[5/2]] exceeds a stack of two [[11/7]]'s.  


== Quotes ==
It can be factored into ([[243/242]])⋅([[245/243]]) and ([[896/891]])⋅([[2835/2816]]).
''"245/242 should be the frostma because 243/242 is the rastma..."'' -Praveen Venkataramana
 
== Temperaments ==
[[Tempering out]] this comma alone in the 11-limit results in the rank-4 '''frostmic''' temperament (→ [[Catalog of rank-4 temperaments #Frostmic (245/242)]]), or in the 2.5.7.11 subgroup, the rank-3 '''frost''' temperament. In either case, a stack of two 11/7's is equated with a 5/2 major tenth, enabling [[frostmic chords]]. It is also used in the construction of the [[No-threes subgroup temperaments #Frostburn|frostburn]] temperament.
 
== Etymology ==
This comma was named after [[User:Frostburn|Frostburn]] in 2022. Before it got the name ''frostma'', it was known as the ''cassacot'', probably derived from [[cassandra]] and [[tetracot]]. However, ''cassandra'' was a misnomer for [[andromeda]]. The temperament's name was later corrected. Since then, ''cassacot'' has lost its root, thus justifying the new name.
 
<blockquote>
245/242 should be the frostma because 243/242 is the rastma…
</blockquote>
—[[Praveen Venkataramana]]
 
[[Category:Frostmic]]
[[Category:Commas named after composers]]
[[Category:Commas named after music theorists]]