6561/6400: Difference between revisions
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Dave Keenan (talk | contribs) Changed "2" to "two". |
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'''6561/6400''', the '''double syntonic comma''', is equal to | '''6561/6400''', the '''double syntonic comma''', is equal to two [[81/80]]'s stacked or (81/80)<sup>2</sup>. | ||
== Sagittal notation == | |||
In the [[Sagittal]] system, the downward version of this comma (possibly tempered) is represented by the sagittal {{sagittal | \\! }} and is called the '''25 small diesis''', or '''25S''' for short, because the simplest interval it notates is 25/1 = 5×5 (equiv. 25/16), as for example in E{{nbhsp}}{{sagittal | b }}-B{{nbhsp}}{{sagittal | \\! }}. The upward version is called '''1/25S''' or '''25S up''' and is represented by {{sagittal| //| }}. | |||