20afdo

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← 19afdo20afdo21afdo →
Prime factorization 22 × 5
Fifth 30/20 (701.955c)

20afdo (arithmetic frequency division of the octave), or 20odo (otonal division of the octave), divides the octave into 20 parts of 1/20 each. As a scale it may be known as mode 20 of the harmonic series or the Over-20 scale.

otone 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
freq. ratio 1/1 21/20 11/10 23/20 6/5 5/4 13/10 27/20 7/5 29/20 3/2 31/20 8/5 33/20 17/10 7/4 9/5 37/20 19/10 39/20 2/1
cents 0 84 165 242 316 386 454 520 583 643 702 759 814 867 919 969 1018 1065 1111 1156 1200

Internal intervals

A reference chart to find cents values for every interval available in this scale:

20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39
20 0 84 165 242 316 386 454 520 583 643 702 759 814 867 919 969 1018 1065 1111 1156
21 1116 0 81 157 231 302 370 435 498 559 617 674 729 782 834 884 933 981 1027 1072
22 1035 1119 0 77 151 221 289 355 418 478 537 594 649 702 754 804 853 900 946 991
23 958 1043 1123 0 74 144 212 278 341 401 460 517 572 625 677 727 776 823 869 914
24 884 969 1049 1126 0 71 139 204 267 328 386 443 498 551 603 653 702 749 796 841
25 814 583 979 1056 1129 0 68 133 196 257 316 372 427 481 532 583 631 679 725 770
26 746 830 911 988 1061 1132 0
27
28
29
30
31
32
33
34
35
36
37
38
39

Scales

Rotated Ternessbabdec

  • 21/20
  • 6/5
  • 7/5
  • 3/2
  • 7/4
  • 2/1