8000/7921

From Xenharmonic Wiki
Jump to navigation Jump to search
This page presents a novelty topic. It features ideas which are less likely to find practical applications in xenharmonic music. It may contain numbers that are impractically large, exceedingly complex, or chosen arbitrarily. Novelty topics are often developed by a single person or a small group. As such, this page may also feature idiosyncratic terms, notations, or conceptual frameworks.
Interval information
Ratio 8000/7921
Subgroup monzo 2.5.89 [6 3 -2
Size in cents 17.18091¢
Name Incisor comma
Color name 89uuy31
FJS name [math]\text{P1}^{5,5,5}_{89,89}[/math]
Special properties reduced
Tenney height (log2 nd) 25.9173
Weil height (log2 max(n, d)) 25.9316
Wilson height (sopfr(nd)) 205
Harmonic entropy
(Shannon, [math]\sqrt{nd}[/math])
~3.34125 bits
Comma size small
open this interval in xen-calc

8000/7921, a.k.a. the incisor comma, is tempered out by the Teefs temperament.

Tempering this comma on its own gives the incisor temperament, a rank-2, 2.5.89 subgroup tuning.

Incisor

Equal Temperament Mappings
2	5	89	
[ ⟨	1	2	6	]
⟨	3	7	20	] ⟩
 
Reduced Mapping
2	5	89	
[ ⟨	1	2	6	]
⟨	0	1	2	] ⟩
 
TE Generator Tunings (cents)
⟨1194.0223, 366.0414]
 
TE Step Tunings (cents)
⟨95.89814, 366.04140]
 
TE Tuning Map (cents)
⟨1194.022, 2754.086, 7896.217]
 
TE Mistunings (cents)
⟨-5.978, -32.228, 125.337]

These calculations use inharmonic TE. Subgroup TE will not work because the basis is not a subgroup of the rational numbers or has a redundant entry or something else is wrong.
 
Complexity	0.182135
Adjusted Error	91.808421 cents
TE Error	14.177301 cents/octave
 
Unison Vector
[2, 2, -1⟩ (100:89)