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Equal Divisions of Rational Intervals

Tables

  1. Octave (2/1)
  2. Quintave (3/2)
  3. Fourth (4/3)
  4. Minor Sixth (8/5)
  5. Major Sixth (5/3)
  6. Minor Seventh (9/5)
  7. Ninth (9/4)
  8. Major Tenth (5/2)
  9. Twelfth (3/1)
  10. Double Octave (4/1)
  11. Fifth Harmonic (5/1)
  12. Seventh Harmonic (7/1)
  13. Triple Octave (8/1)
  14. 11-Subminor Tritone (11/8)
  15. 11-Neutral Ninth (11/5)
  16. Subminor Tenth (7/3)
  17. Harmonic Seventh (7/4)
  18. Just Tritone (7/5)
  19. Augmented Just Tritone (10/7)
  20. 11-Subminor Sixth (11/7)
  21. Supermajor Sixth (12/7)

Equal Divisions of the Harmonic Seventh

Compiled by X. J. Scott, January 2008

Tuning step size recipe Scale Pattern
5th root of 7/4 193.765 cents LMSO Scale Recipe File Icon
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194
194
194
388
194
581
194
775
194
969
 
1163
 
1356
 
1550
6th root of 7/4 161.471 cents LMSO Scale Recipe File Icon
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161
161
161
323
161
484
161
646
161
807
161
969
 
1130
 
1292
 
1453
7th root of 7/4 138.404 cents LMSO Scale Recipe File Icon
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138
138
138
277
138
415
138
554
138
692
138
830
138
969
 
1107
 
1246
 
1384
 
1522
8th root of 7/4 121.103 cents LMSO Scale Recipe File Icon
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121
121
121
242
121
363
121
484
121
606
121
727
121
848
121
969
 
1090
 
1211
 
1332
 
1453
9th root of 7/4 107.647 cents LMSO Scale Recipe File Icon
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108
108
108
215
108
323
108
431
108
538
108
646
108
754
108
861
108
969
 
1076
 
1184
 
1292
 
1399
 
1507
10th root of 7/4 96.883 cents LMSO Scale Recipe File Icon
0
97
97
97
194
97
291
97
388
97
484
97
581
97
678
97
775
97
872
97
969
 
1066
 
1163
 
1259
 
1356
 
1453
11th root of 7/4 88.075 cents LMSO Scale Recipe File Icon
0
88
88
88
176
88
264
88
352
88
440
88
528
88
617
88
705
88
793
88
881
88
969
 
1057
 
1145
 
1233
 
1321
 
1409
12th root of 7/4 80.735 cents LMSO Scale Recipe File Icon
0
81
81
81
161
81
242
81
323
81
404
81
484
81
565
81
646
81
727
81
807
81
888
81
969
 
1050
 
1130
 
1211
 
1292
 
1373
 
1453
13th root of 7/4 74.525 cents LMSO Scale Recipe File Icon
0
75
75
75
149
75
224
75
298
75
373
75
447
75
522
75
596
75
671
75
745
75
820
75
894
75
969
 
1043
 
1118
 
1192
 
1267
 
1341
 
1416
14th root of 7/4 69.202 cents LMSO Scale Recipe File Icon
0
69
69
69
138
69
208
69
277
69
346
69
415
69
484
69
554
69
623
69
692
69
761
69
830
69
900
69
969
 
1038
 
1107
 
1176
 
1246
 
1315
 
1384
 
1453
15th root of 7/4 64.588 cents LMSO Scale Recipe File Icon
0
65
65
65
129
65
194
65
258
65
323
65
388
65
452
65
517
65
581
65
646
65
710
65
775
65
840
65
904
65
969
 
1033
 
1098
 
1163
 
1227
 
1292
 
1356
 
1421
16th root of 7/4 60.552 cents LMSO Scale Recipe File Icon
0
61
61
61
121
61
182
61
242
61
303
61
363
61
424
61
484
61
545
61
606
61
666
61
727
61
787
61
848
61
908
61
969
 
1029
 
1090
 
1150
 
1211
 
1272
 
1332
 
1393
 
1453
17th root of 7/4 56.990 cents LMSO Scale Recipe File Icon
0
57
57
57
114
57
171
57
228
57
285
57
342
57
399
57
456
57
513
57
570
57
627
57
684
57
741
57
798
57
855
57
912
57
969
 
1026
 
1083
 
1140
 
1197
 
1254
 
1311
 
1368
 
1425
18th root of 7/4 53.824 cents LMSO Scale Recipe File Icon
0
54
54
54
108
54
161
54
215
54
269
54
323
54
377
54
431
54
484
54
538
54
592
54
646
54
700
54
754
54
807
54
861
54
915
54
969
 
1023
 
1076
 
1130
 
1184
 
1238
 
1292
 
1346
 
1399
 
1453
19th root of 7/4 50.991 cents LMSO Scale Recipe File Icon
0
51
51
51
102
51
153
51
204
51
255
51
306
51
357
51
408
51
459
51
510
51
561
51
612
51
663
51
714
51
765
51
816
51
867
51
918
51
969
 
1020
 
1071
 
1122
 
1173
 
1224
 
1275
 
1326
 
1377
 
1428
20th root of 7/4 48.441 cents LMSO Scale Recipe File Icon
0
48
48
48
97
48
145
48
194
48
242
48
291
48
339
48
388
48
436
48
484
48
533
48
581
48
630
48
678
48
727
48
775
48
824
48
872
48
920
48
969
 
1017
 
1066
 
1114
 
1163
 
1211
 
1259
 
1308
 
1356
 
1405
21st root of 7/4 46.135 cents LMSO Scale Recipe File Icon
0
46
46
46
92
46
138
46
185
46
231
46
277
46
323
46
369
46
415
46
461
46
507
46
554
46
600
46
646
46
692
46
738
46
784
46
830
46
877
46
923
46
969
 
1015
 
1061
 
1107
 
1153
 
1199
 
1246
 
1292
 
1338
 
1384
 
1430
22nd root of 7/4 44.038 cents LMSO Scale Recipe File Icon
0
44
44
44
88
44
132
44
176
44
220
44
264
44
308
44
352
44
396
44
440
44
484
44
528
44
572
44
617
44
661
44
705
44
749
44
793
44
837
44
881
44
925
44
969
 
1013
 
1057
 
1101
 
1145
 
1189
 
1233
 
1277
 
1321
 
1365
 
1409
23rd root of 7/4 42.123 cents LMSO Scale Recipe File Icon
0
42
42
42
84
42
126
42
168
42
211
42
253
42
295
42
337
42
379
42
421
42
463
42
505
42
548
42
590
42
632
42
674
42
716
42
758
42
800
42
842
42
885
42
927
42
969
 
1011
 
1053
 
1095
 
1137
 
1179
 
1222
 
1264
 
1306
 
1348
 
1390
 
1432
24th root of 7/4 40.368 cents LMSO Scale Recipe File Icon
0
40
40
40
81
40
121
40
161
40
202
40
242
40
283
40
323
40
363
40
404
40
444
40
484
40
525
40
565
40
606
40
646
40
686
40
727
40
767
40
807
40
848
40
888
40
928
40
969
 
1009
 
1050
 
1090
 
1130
 
1171
 
1211
 
1251
 
1292
 
1332
 
1373
 
1413
25th root of 7/4 38.753 cents LMSO Scale Recipe File Icon
0
39
39
39
78
39
116
39
155
39
194
39
233
39
271
39
310
39
349
39
388
39
426
39
465
39
504
39
543
39
581
39
620
39
659
39
698
39
736
39
775
39
814
39
853
39
891
39
930
39
969
 
1008
 
1046
 
1085
 
1124
 
1163
 
1201
 
1240
 
1279
 
1318
 
1356
 
1395
 
1434
26th root of 7/4 37.263 cents LMSO Scale Recipe File Icon
0
37
37
37
75
37
112
37
149
37
186
37
224
37
261
37
298
37
335
37
373
37
410
37
447
37
484
37
522
37
559
37
596
37
633
37
671
37
708
37
745
37
783
37
820
37
857
37
894
37
932
37
969
 
1006
 
1043
 
1081
 
1118
 
1155
 
1192
 
1230
 
1267
 
1304
 
1341
 
1379
 
1416
27th root of 7/4 35.882 cents LMSO Scale Recipe File Icon
0
36
36
36
72
36
108
36
144
36
179
36
215
36
251
36
287
36
323
36
359
36
395
36
431
36
466
36
502
36
538
36
574
36
610
36
646
36
682
36
718
36
754
36
789
36
825
36
861
36
897
36
933
36
969
 
1005
 
1041
 
1076
 
1112
 
1148
 
1184
 
1220
 
1256
 
1292
 
1328
 
1364
 
1399
 
1435
28th root of 7/4 34.601 cents LMSO Scale Recipe File Icon
0
35
35
35
69
35
104
35
138
35
173
35
208
35
242
35
277
35
311
35
346
35
381
35
415
35
450
35
484
35
519
35
554
35
588
35
623
35
657
35
692
35
727
35
761
35
796
35
830
35
865
35
900
35
934
35
969
 
1003
 
1038
 
1073
 
1107
 
1142
 
1176
 
1211
 
1246
 
1280
 
1315
 
1349
 
1384
 
1419
29th root of 7/4 33.408 cents LMSO Scale Recipe File Icon
0
33
33
33
67
33
100
33
134
33
167
33
200
33
234
33
267
33
301
33
334
33
367
33
401
33
434
33
468
33
501
33
535
33
568
33
601
33
635
33
668
33
702
33
735
33
768
33
802
33
835
33
869
33
902
33
935
33
969
 
1002
 
1036
 
1069
 
1102
 
1136
 
1169
 
1203
 
1236
 
1269
 
1303
 
1336
 
1370
 
1403
 
1437
30th root of 7/4 32.294 cents LMSO Scale Recipe File Icon
0
32
32
32
65
32
97
32
129
32
161
32
194
32
226
32
258
32
291
32
323
32
355
32
388
32
420
32
452
32
484
32
517
32
549
32
581
32
614
32
646
32
678
32
710
32
743
32
775
32
807
32
840
32
872
32
904
32
937
32
969
 
1001
 
1033
 
1066
 
1098
 
1130
 
1163
 
1195
 
1227
 
1259
 
1292
 
1324
 
1356
 
1389
 
1421
31st root of 7/4 31.252 cents LMSO Scale Recipe File Icon
0
31
31
31
63
31
94
31
125
31
156
31
188
31
219
31
250
31
281
31
313
31
344
31
375
31
406
31
438
31
469
31
500
31
531
31
563
31
594
31
625
31
656
31
688
31
719
31
750
31
781
31
813
31
844
31
875
31
906
31
938
31
969
 
1000
 
1031
 
1063
 
1094
 
1125
 
1156
 
1188
 
1219
 
1250
 
1281
 
1313
 
1344
 
1375
 
1406
32nd root of 7/4 30.276 cents LMSO Scale Recipe File Icon
0
30
30
30
61
30
91
30
121
30
151
30
182
30
212
30
242
30
272
30
303
30
333
30
363
30
394
30
424
30
454
30
484
30
515
30
545
30
575
30
606
30
636
30
666
30
696
30
727
30
757
30
787
30
817
30
848
30
878
30
908
30
939
30
969
 
999
 
1029
 
1060
 
1090
 
1120
 
1150
 
1181
 
1211
 
1241
 
1272
 
1302
 
1332
 
1362
 
1393
 
1423

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