From Xenharmonic Wiki
Jump to navigation Jump to search
Interval information
Ratio 324/323
Subgroup monzo [2 4 -1 -1
Size in cents 5.3515778¢
Name photisma
Color name 19u17u-2, nusu negative
2nd, Nusu comma
FJS name [math]\text{d}{-2}_{17,19}[/math]
Special properties square superparticular,
Tenney height (log2 nd) 16.6752
Weil height (log2 max(n, d)) 16.6797
Wilson height (sopfr (nd)) 52
Harmonic entropy
(Shannon, [math]\sqrt{n\cdot d}[/math])
~2.56162 bits
Comma size small
S-expression S18
open this interval in xen-calc

324/323, the photisma, is a 19-limit small comma. It is the difference between 18/17 and 19/18, as well as the amount by which 323/216 falls short of 3/2. It is close to a quarter of 81/80; four of them fall short of that interval by the unnoticeable comma 10884540241/10883911680 (~0.1 ¢), the lakisma.


The name photisma was named after the photia temperament by Xenllium in 2023.

See also