1-3-9-11-13-15 pentadekany

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Circle diagram.

A 15-odd-limit pentadekany. This creates a scale of 1 65/64 33/32 13/12 9/8 39/32 5/4 11/8 45/32 143/96 3/2 13/8 55/32 11/6 15/8 2/1, with steps of 65/64 66/65 104/99 27/26 13/12 40/39 11/10 45/44 143/135 144/143 13/12 55/52 16/15 45/44 16/15. This does have plenty of good intervals, including 8 perfect fifths, but the number of closely clustered comma steps is also quite significant, particularly around the root, giving you quite a few options to create chorused sounds or more subtle disonnances.

! 1-3-9-11-13-15_Pentadekany.scl
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1 3 9 11 13 15 2-combination Pentadekany
15
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26.841
53.272
138.572
203.910
342.482
386.313
551.317
590.223
689.890
701.955
840.527
937.631
1049.362
1088.268
1200