67ed5: Difference between revisions
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'''[[Ed5|Division of the 5th harmonic]] into 67 equal parts''' (67ed5) is related to [[29edo]], but with the 5/1 rather than the 2/1 being just. The octave is about 6.0164 cents stretched and the step size is about 41.5868 cents. | '''[[Ed5|Division of the 5th harmonic]] into 67 equal parts''' (67ed5) is related to [[29edo]], but with the [[5/1]] rather than the [[2/1]] being [[just]]. The octave is about 6.0164 cents [[Stretched octave|stretched]] and the step size is about 41.5868 cents. | ||
== Theory == | == Theory == | ||
67ed5 has a generally sharp tendency for [[harmonic]]s up to 28. Unlike 29edo, it is only [[consistent]] up to the 8-[[integer-limit]], with discrepancy for the 9th harmonic. As an equal temperament, it [[tempering out|tempers out]] 49/48 in the [[7-limit]]; 55/54 in the 11-limit; 65/64 and 91/90 in the 13-limit; 85/84 in the 17-limit; 77/76 in the 19-limit; 70/69 in the 23-limit; 58/57 in the 29-limit; and 93/92 in the 31-limit. | |||
=== Prime harmonics === | === Prime harmonics === | ||
Compared to 29edo, 67ed5 has a much better 5/1, 7/1, 11/1, 13/1, and 17/1, at the expense of a much worse 3/1. | Compared to 29edo, 67ed5 has a much better 5/1, 7/1, 11/1, 13/1, and 17/1, at the expense of a much worse 3/1. | ||
The biggest argument in favor of this trade-off is that 29edo’s 7/1 is so inaccurate as to be unusable for many. So, the fact that 67ed5 makes the 3/1 not as good, but still definitely useable, and in return, replaces that | The biggest argument in favor of this trade-off is that 29edo’s 7/1 is so inaccurate as to be unusable for many. So, the fact that 67ed5 makes the 3/1 not as good, but still definitely useable, and in return, replaces that unusable 7/1 with almost perfectly in-tune one, could be seen as a worthwhile trade-off. | ||
{{Harmonics in equal|67|5|1|intervals=prime|columns=11}} | {{Harmonics in equal|67|5|1|intervals=prime|columns=11}} | ||
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[[Category:29edo]] | [[Category:29edo]] | ||