Phaotic comma: Difference between revisions
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The '''photic comma''', or '''photisma''', is an [[unnoticeable comma|unnoticeable]] [[13-limit]] comma with a ratio of '''256000/255879''', and a size of approximately 0.82 [[cent]]s. It is significant in that it is the interval separating a stack of two [[81/80|meantone commas]] from [[40/39]]. Tempering it out thus splits 40/39 into two equal halves, each representing 81/80, leads to a form of ''' | The '''photic comma''', or '''photisma''', is an [[unnoticeable comma|unnoticeable]] [[13-limit]] comma with a ratio of '''256000/255879''', and a size of approximately 0.82 [[cent]]s. It is significant in that it is the interval separating a stack of two [[81/80|meantone commas]] from [[40/39]]. Tempering it out thus splits 40/39 into two equal halves, each representing 81/80, leads to a form of '''photic temperament'''. | ||