1287/1280: Difference between revisions

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'''1287/1280''', the '''catadictma''', is a [[13-limit]] [[small comma]]. It is the amount by which a stack consisting of [[16/11]] and [[16/13]] falls short of [[9/5]], or the comma that, when tempered out, has [[4/3]] equidistant between [[13/10]] and [[11/8]]. It can be factored into simpler commas as ([[351/350]])([[385/384]]), or as ([[225/224]])([[1001/1000]]). In terms of superparticulars, it is ([[33/32]])/([[40/39]]). By tempering it out is defined the '''catadictmic temperament''', which enables the [[catadictmic chords]]. Adding [[676/675]] lets you efficiently incorporate 11-limit harmony into [[barbados]] chords.
'''1287/1280''', the '''catadictma''', is a [[13-limit]] [[small comma]]. It is the amount by which a stack consisting of [[16/11]] and [[16/13]] falls short of [[9/5]], or the comma that, when tempered out, has [[4/3]] equidistant between [[13/10]] and [[11/8]]. It can be factored into simpler commas as ([[351/350]])([[385/384]]), or as ([[225/224]])([[1001/1000]]). In terms of superparticulars, it is ([[33/32]])/([[40/39]]) and ({{S|9}} = [[81/80]])/(S12 = [[144/143]]). By tempering it out is defined the '''catadictmic temperament''', which enables the [[catadictmic chords]]. Adding [[676/675]] lets you efficiently incorporate 11-limit harmony into [[barbados]] chords.


== See also ==
== See also ==

Latest revision as of 16:51, 18 July 2025

Interval information
Ratio 1287/1280
Factorization 2-8 × 32 × 5-1 × 11 × 13
Monzo [-8 2 -1 0 1 1
Size in cents 9.441892¢
Name catadictma
Color name 3o1og1, thologu 1sn,
Thologu comma
FJS name [math]\displaystyle{ \text{d1}^{11,13}_{5} }[/math]
Special properties reduced
Tenney height (log2 nd) 20.6517
Weil height (log2 max(n, d)) 20.6596
Wilson height (sopfr(nd)) 51
Comma size small
Open this interval in xen-calc

1287/1280, the catadictma, is a 13-limit small comma. It is the amount by which a stack consisting of 16/11 and 16/13 falls short of 9/5, or the comma that, when tempered out, has 4/3 equidistant between 13/10 and 11/8. It can be factored into simpler commas as (351/350)(385/384), or as (225/224)(1001/1000). In terms of superparticulars, it is (33/32)/(40/39) and (S9 = 81/80)/(S12 = 144/143). By tempering it out is defined the catadictmic temperament, which enables the catadictmic chords. Adding 676/675 lets you efficiently incorporate 11-limit harmony into barbados chords.

See also