65/19 atom: Difference between revisions
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m BudjarnLambeth moved page 272629760/272629233 to 65/19 atom: Long comma name (I didn’t make the name 65/19 atom, it was already in the info box, just didn’t show up for some reason) |
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Revision as of 05:33, 4 November 2024
Interval information |
272629233/272629760, the 65/19 atom, is an unnoticeable comma in the 2.3.5.13.19 subgroup. It is the amount by which the 13-comma 6656/6561 ("tetris comma") exceeds the 19/5-comma 41553/40960 (the difference between the classical major third 5/4 lowered by an apotome and the novemdecimal minor third 19/16). Their difference is small enough that sagittal accidentals do not distinguish between the 13-comma and the 19/5-comma: the most accurate possible representation of the 13th harmonic in sagittal accidentals (as three octaves above a )/||| P5
) accrues this 0.0033 ¢ error.