Scheme comma: Difference between revisions

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The '''scheme comma''' is a [[7-limit]] [[unnoticeable comma]]. It is equal to the difference between the [[Pythagorean comma]] and the keema ([[875/864]]). This makes it a ''keemic schisma'', from which the name ''scheme'' derives. It is also equal to the difference between the schisma ([[32805/32768]]) and the ragisma ([[4375/4374]]).
The '''scheme comma''' is an [[unnoticeable comma|unnoticeable]] [[7-limit]] [[comma]] measuring about 1.56 [[cent]]s. It is equal to the difference between the [[Pythagorean comma]] and the keema ([[875/864]]). This makes it a ''keemic schisma'', from which the name ''scheme'' derives. It is also equal to the difference between the schisma ([[32805/32768]]) and the ragisma ([[4375/4374]]).
 
== Temperaments ==
[[Tempering out]] this comma leads to the [[scheme]] temperament.
 
== Etymology ==
This comma was named by {{u|Jerdle}} in 2025.  


[[Category:Commas named for the intervals they stack]]
[[Category:Commas named for the intervals they stack]]

Revision as of 10:20, 29 July 2026

Interval information
Ratio 14348907/14336000
Factorization 2-14 × 315 × 5-3 × 7-1
Monzo [-14 15 -3 -1
Size in cents 1.557965¢
Name scheme comma
Color name LLrg3-2, Lalarutrigu comma
FJS name [math]\displaystyle{ \text{m}{-2}_{5,5,5,7} }[/math]
Special properties reduced
Tenney norm (log2 nd) 47.5476
Weil norm (log2 max(n, d)) 47.5489
Wilson norm (sopfr(nd)) 95
Comma size unnoticeable
Open this interval in xen-calc

The scheme comma is an unnoticeable 7-limit comma measuring about 1.56 cents. It is equal to the difference between the Pythagorean comma and the keema (875/864). This makes it a keemic schisma, from which the name scheme derives. It is also equal to the difference between the schisma (32805/32768) and the ragisma (4375/4374).

Temperaments

Tempering out this comma leads to the scheme temperament.

Etymology

This comma was named by Jerdle in 2025.