Sensipent comma: Difference between revisions

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'''78732/78125''' = {{Monzo| 2 9 -7 }}, the '''sensipent comma''' or '''medium semicomma''', is an interval of 13.399 [[cent]]s which is the amount by which the difference between seven minor thirds and two fourths [[octave reduction|exceeds an octave]], in other words ([[6/5]])<sup>7</sup> / ([[4/3]])<sup>2</sup> / [[2/1|2]]. Equivalently, it is also equal to ([[6/5]])<sup>5</sup> / ([[10/9]])<sup>2</sup> / [[2/1|2]]. It is also the difference between [[5/4]] and 3 [[27/25]]s. Tempering it out leads to [[Sensipent_family#Sensipent|sensipent temperament]].
The '''sensipent comma''' ([[ratio]]: 78732/78125, {{monzo|legend=1| 2 9 -7 }}), also known as the '''medium semicomma''', is [[small comma|small]] [[5-limit]] [[comma]] of about 13.4 [[cent]]s. It is the amount by which a stack of seven [[6/5|classical minor thirds]] exceeds two [[4/3|perfect fourths]] and an [[octave]], in other words ([[6/5]])<sup>7</sup>/(([[4/3]])<sup>2</sup>×[[2/1|2]]). Equivalently, it is also equal to ([[6/5]])<sup>5</sup>/(([[10/9]])<sup>2</sup>×[[2/1|2]]). It is also the difference between [[5/4]] and a stack of three [[27/25]] large limmas.  
 
== Temperaments ==
[[Tempering out]] this comma in the 5-limit leads to the [[sensipent]] temperament.
 
See [[Sensipent family]] for the [[family of temperaments]] where it is tempered out.  
 
== See also ==
* [[Syntonic–kleismic equivalence continuum]]


[[Category:Sensipent]]
[[Category:Sensipent]]
[[Category:Commas named for the generator of their temperament]]
[[Category:Commas named for the generator of their temperament]]

Latest revision as of 16:36, 1 October 2026

Interval information
Ratio 78732/78125
Factorization 22 × 39 × 5-7
Monzo [2 9 -7⟩
Size in cents 13.39901 ¢
Names sensipent comma,
medium semicomma
Color name g72, Sepgu comma
FJS name [math]\displaystyle{ \text{dd2}_{5,5,5,5,5,5,5} }[/math]
Special properties reduced
Tenney norm (log2 nd) 32.5182
Weil norm (log2 max(n, d)) 32.5293
Wilson norm (sopfr(nd)) 66
Comma size small
Open this interval in xen-calc

The sensipent comma (ratio: 78732/78125, monzo: [2 9 -7⟩), also known as the medium semicomma, is small 5-limit comma of about 13.4 cents. It is the amount by which a stack of seven classical minor thirds exceeds two perfect fourths and an octave, in other words (6/5)7/((4/3)2×2). Equivalently, it is also equal to (6/5)5/((10/9)2×2). It is also the difference between 5/4 and a stack of three 27/25 large limmas.

Temperaments

Tempering out this comma in the 5-limit leads to the sensipent temperament.

See Sensipent family for the family of temperaments where it is tempered out.

See also