Olympia

Interval information

Ratio	131072/130977
Factorization	217 × 3-5 × 7-2 × 11-1
Monzo	[17 -5 0 -2 -1⟩
Size in cents	1.25524¢
Names	olympia, olympic comma
Color name	salururu unison, s1urr1
FJS name	[math]\text{P1}_{7,7,11}[/math]
Special properties	reduced, reduced subharmonic
Tenney height (log2 nd)	33.999
Weil height (log2 max(n, d))	34
Wilson height (sopfr(nd))	74
Harmonic entropy (Shannon, [math]\sqrt{nd}[/math])	~1.21294 bits
Comma size	unnoticeable
S-expression	S642 × S65
open this interval in xen-calc

The olympia (monzo: [17 -5 0 -2 -1⟩, ratio: 131072/130977), otherwise known as the olympic comma, is an 11-limit (also 2.3.7.11 subgroup) unnoticeable comma measuring about 1.26 cents. It is the difference between the undecimal quartertone (33/32) and a stack of two septimal commas (64/63). Even more interesting is the possible factorization into two 13-limit superparticular ratios: (2080/2079)(4096/4095). In fact, the olympia is the default interval represented by three minas in the Olympian level of Sagittal notation, from which it gets its name.

Temperaments

Tempering out this comma in the full 11-limit results in the rank-4 olympic temperament , with a very natural 13-limit extension {2080/2079, 4096/4095} (→ Rank-4 temperament #Olympic (131072/130977)).

As its order of 11 is one, any 7-limit temperament can be immediately extended to the 11-limit in theory by tempering out this comma. To make practical sense, however, it requires low complexity and high accuracy of 64/63, which is less common.

Etymology

The olympia was named by Flora Canou in 2021, referring to the Olympian level of Sagittal notation.

See also

• Unnoticeable comma