Undevicesimal counterschisma

Interval information

Ratio	717897987691852588770249 / 717799705396186072481792
Subgroup monzo	2.3.19 [-75 50 -1⟩
Size in cents	0.2370271¢
Name	undevicesimal counterschisma
Color name	L719u-6, seplanu negative 6th
FJS name	[math]\displaystyle{ \text{7d}{-6}_{19} }[/math]
Special properties	reduced
Tenney height (log2 nd)	158.496
Weil height (log2 max(n, d))	158.496
Wilson height (sopfr(nd))	319
Harmonic entropy (Shannon, [math]\displaystyle{ \sqrt{nd} }[/math])	~1.19874 bits
Comma size	unnoticeable
Open this interval in xen-calc

The undevicesimal counterschisma is a 19-limit unnoticeable comma measuring about 0.24 cents. While the undevicesimal schisma (513/512) is the difference between the Pythagorean minor third (32/27) and the otonal minor third (19/16), the undevicesimal counterschisma, in contrast, is the difference between 25 Pythagorean whole tones and the 19th harmonic, or equivalently stated, the difference between the 53-comma and the undevicesimal schisma.

Etymology

This comma was named by Xenllium in 2025.

See also

• Unnoticeable comma
• 5-limit counterschisma