Sensipent comma

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

78732/78125 = [2 9 -7⟩, the sensipent comma or medium semicomma, is an interval of 13.399 cents which is the amount by which the difference between seven minor thirds and two fourths exceeds 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 3 27/25s. Tempering it out leads to sensipent temperament.