6561/6400: Difference between revisions
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'''6561/6400''', the '''double syntonic comma''', is equal to 2 [[81/80]]'s stacked or (81/80)<sup>2</sup>. | '''6561/6400''', the '''double syntonic comma''', is equal to 2 [[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 ratio it notates is 16:25, as for example in E{{sagittal | b }}:B{{sagittal | \\! }}. | |||