625/624: Difference between revisions
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'''625/624''', the '''tunbarsma''', is an [[unnoticeable comma|unnoticeable]] [[13-limit]] comma with a value of roughly 2.77 [[cent]]s. Tempering out this comma not only equates [[25/24]] with [[26/25]] – splitting [[13/12]] in half and going part of the way towards splitting the [[9/8]] whole tone into three (the other comma that needs to be tempered in order to finish this job is [[676/675]]) – but also equates [[39/32]] with the interval that results from stacking four [[5/4]] major thirds then octave-reducing. | '''625/624''', the '''tunbarsma''', is an [[unnoticeable comma|unnoticeable]] [[13-limit]] comma with a value of roughly 2.77 [[cent]]s. Tempering out this comma not only equates [[25/24]] with [[26/25]] – splitting [[13/12]] in half and going part of the way towards splitting the [[9/8]] whole tone into three (the other comma that needs to be tempered in order to finish this job is [[676/675]]) – but also equates [[39/32]] with the interval that results from stacking four [[5/4]] major thirds then octave-reducing. | ||
In terms of commas, it is the difference between | |||
* [[325/324]] and [[676/675]] | |||
* [[385/384]] and [[1001/1000]] | |||
It can be factored into | |||
* [[1575/1573]] and [[3025/3024]] | |||
* [[2200/2197]] and [[4225/4224]] | |||
* [[729/728]] and [[4375/4374]] | |||
In the 17-limit, it can be factored into | |||
* [[1225/1224]] and [[1275/1274]] | |||
== See also == | |||
* [[Unnoticeable comma]] | |||
[[Category:13-limit]] | [[Category:13-limit]] | ||