Immunity comma: Difference between revisions

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The '''immunity comma''' ({{monzo|legend=1| 16 -13 2 }}, [[ratio]]: 1638400/1594323) is a [[Medium comma|medium]] [[5-limit]] [[comma]] of about 47.2 [[cent]]s. It is the difference between two [[81/80|syntonic commas (81/80)]] and a [[256/243|Pythagorean diatonic semitone (256/243)]], or between a [[25/24|classic chromatic semitone (25/24)]] and a [[Pythagorean comma|Pythagorean comma (monzo: [-19 12⟩, ratio: 531441/524288)]].  
The '''immunity comma''' ({{monzo|legend=1| 16 -13 2 }}, [[ratio]]: 1638400/1594323) is a [[Medium comma|medium]] [[5-limit]] [[comma]] of about 47.2 [[cent]]s. It is the difference between the [[256/243|Pythagorean diatonic semitone (256/243)]] and a stack of two [[syntonic comma]]s, or between a [[25/24|diptolemaic chromatic semitone (25/24)]] and a [[Pythagorean comma|Pythagorean comma (monzo: [-19 12⟩, ratio: 531441/524288)]].  


== Temperaments ==
== Temperaments ==
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This comma was named by [[Mike Battaglia]] in 2011 such that the corresponding temperament is paired with [[amity]]<ref>[https://yahootuninggroupsultimatebackup.github.io/tuning/topicId_99315.html#99323 Yahoo! Tuning Group| ''Some new 5-limit microtemperaments'']</ref><ref>[https://yahootuninggroupsultimatebackup.github.io/tuning/topicId_99763.html#99794 Yahoo! Tuning Group| ''Names for forgotten or unclassified temperaments'']</ref>.  
This comma was named by [[Mike Battaglia]] in 2011 such that the corresponding temperament is paired with [[amity]]<ref>[https://yahootuninggroupsultimatebackup.github.io/tuning/topicId_99315.html#99323 Yahoo! Tuning Group| ''Some new 5-limit microtemperaments'']</ref><ref>[https://yahootuninggroupsultimatebackup.github.io/tuning/topicId_99763.html#99794 Yahoo! Tuning Group| ''Names for forgotten or unclassified temperaments'']</ref>.  


: {| class="toccolours"
<blockquote>Perhaps "Immunity," because it's a counterpart to Amity or something like that. </blockquote>
| <blockquote>Perhaps "Immunity," because it's a counterpart to Amity or something like that. </blockquote>
—Mike Battaglia
 
&ndash; Mike Battaglia
|}


== See also ==
== See also ==

Revision as of 18:36, 21 September 2024

Interval information
Ratio 1638400/1594323
Factorization 216 × 3-13 × 52
Monzo [16 -13 2
Size in cents 47.21242¢
Name immunity comma
Color name ssyy2, Sasa-yoyo comma
FJS name [math]\displaystyle{ \text{m2}^{5,5} }[/math]
Special properties reduced
Tenney norm (log2 nd) 41.2484
Weil norm (log2 max(n, d)) 41.2877
Wilson norm (sopfr(nd)) 81
Comma size medium
Open this interval in xen-calc

The immunity comma (monzo[16 -13 2, ratio: 1638400/1594323) is a medium 5-limit comma of about 47.2 cents. It is the difference between the Pythagorean diatonic semitone (256/243) and a stack of two syntonic commas, or between a diptolemaic chromatic semitone (25/24) and a Pythagorean comma (monzo: [-19 12⟩, ratio: 531441/524288).

Temperaments

Tempering out this comma leads to the immunity family of temperaments. These temperaments offer hemifourths and hemitwelfths as a result of dividing the diatonic semitone in equal halves.

Etymology

This comma was named by Mike Battaglia in 2011 such that the corresponding temperament is paired with amity[1][2].

Perhaps "Immunity," because it's a counterpart to Amity or something like that.

—Mike Battaglia

See also

Notes