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{{Infobox Interval | {{Infobox Interval | ||
| Name = | | Name = diptolemaic major second, supersharp comma | ||
| Color name = sayoyo 2nd, syy2 | | Color name = sayoyo 2nd, syy2 | ||
| Comma = yes | | Comma = yes | ||
}} | }} | ||
The ''' | The '''diptolemaic major second''' is a [[5-limit]] [[interval]] measuring about 161{{cent}}. It is the difference between [[27/20]] and [[40/27]], as well as [[9/8]] lowered by two [[81/80|syntonic commas]]. | ||
== Temperaments == | |||
If used as a [[comma]] to be tempered out, this interval may be called the '''supersharp comma''', and tempering it out leads to the rank-2 [[supersharp]] temperament, which splits the octave into two 27/20~40/27 semioctaves and generally tempers 3/2 very sharp (sharper than 3\5). | |||
== Etymology == | == Etymology == | ||
The name ''supersharp'' has been around no later than 2010<ref>[https://en.xen.wiki/index.php?title=Proposed_names_for_rank_2_temperaments&oldid=24809 Xenharmonic Wiki | Proposed names for rank 2 temperaments (Revision as of 22:54, 11 June 2010 by Wikispaces>Mizarian)]</ref>, coming from the fact that a very sharp fifth is a generator for the temperament. | |||
[[User:Tristanbay|Tristan Bay]] proposes the name ''la brea'' in August 2024 in reference to the ''taric'' [[mos scale]] pattern that can be formed from tempering it out. | |||
== Notes == | |||
[[Category:Commas named for their regular temperament properties]] | |||
Latest revision as of 06:36, 3 November 2024
| Interval information |
supersharp comma
The diptolemaic major second is a 5-limit interval measuring about 161 ¢. It is the difference between 27/20 and 40/27, as well as 9/8 lowered by two syntonic commas.
Temperaments
If used as a comma to be tempered out, this interval may be called the supersharp comma, and tempering it out leads to the rank-2 supersharp temperament, which splits the octave into two 27/20~40/27 semioctaves and generally tempers 3/2 very sharp (sharper than 3\5).
Etymology
The name supersharp has been around no later than 2010[1], coming from the fact that a very sharp fifth is a generator for the temperament.
Tristan Bay proposes the name la brea in August 2024 in reference to the taric mos scale pattern that can be formed from tempering it out.