243/242: Difference between revisions
there is a page about these temperaments (plural form, because it lists two of them (if I get this right)) |
We have simpler ratios like 11/9 and 27/22 to describe this comma |
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'''243/242''', otherwise known as the '''rastma''' or the '''neutral third comma''', is an [[11-limit]] comma with a value of roughly 7.13912 [[cent|cents]]. | '''243/242''', otherwise known as the '''rastma''' or the '''neutral third comma''', is an [[11-limit]] comma with a value of roughly 7.13912 [[cent|cents]]. It is significant in Just Intonation as the amount by which a stack of two [[33/32]] quartertones falls short of an [[2187/2048|apotome]] as well as the difference between [[11/9]] and [[27/22]]. Tempering it out leads to a form of [[rastmic temperaments|rastmic temperament]]. When not tempered out, the rastma behaves much as the 11-limit counterpart to the 5-limit's [[81/80|syntonic comma]] – a property that becomes especially apparent when one works extensively with 33/32 quartertones. | ||
[[Category:11-limit]] | [[Category:11-limit]] | ||