15edX is the scale which occurs as the dominant minor edX.

Intervals

Degrees Enneatonic Minor mode Middletown temperament Neutral mode Middletown temperament Major mode Middletown temperament
Aeolian-Dorian Dorian Dorian-Mixolydian Mixolydian Mixolydian-Ionian
Subpental Pental Superpental Subpental Pental Superpental
Soft Intense
Minimum Maximum Minimum Maximum Minimum Maximum Minimum Maximum Minimum Maximum Minimum Maximum Minimum Maximum Minimum Maximum Minimum Maximum Minimum Maximum
1 F#/Gb 96 97.778 100 101.818 102.857 104 105 106.667 107.586 110.345 112
2 G 192 195.556 200 203.636 205.714 208 210 213.333 215.172 220.69 224
3 G#/Jb G#/Ab 288 293.333 300 305.4545 308.571 312 315 320 322.759 331.034 336
4 J A 384 391.111 400 407.273 411.429 416 420 426.667 430.345 441.379 448
5 A B 480 488.889 500 509.091 514.286 520 525 533.333 537.931 551.724 560
6 A#/Bb B#/Hb 576 586.667 600 610.909 617.143 624 630 640 645.517 662.069 672
7 B H 672 684.444 700 712.727 720 728 735 746.667 753.103 772.414 784
8 B#/Hb H#/Cb 768 782.822 800 814.5455 822.857 832 845 853.333 860.69 882.759 896
9 H C 864 880 900 916.364 925.714 936 940 960 968.276 993.103 1008
10 C D 960 977.778 1000 1018.182 1028.571 1040 1050 1066.667 1075.862 1103.448 1120
11 C#/Db D#/Sb 1056 1075.556 1100 1120 1131.429 1144 1155 1173.333 1183.448 1213.379 1232
12 D S 1152 1173.333 1200 1221.818 1234.286 1248 1260 1280 1291.034 1324.138 1344
13 D#/Eb S#/Eb 1248 1271.111 1300 1323.636 1337.143 1352 1365 1386.667 1398.621 1424.483 1456
14 E 1344 1368.889 1400 1425.4545 1440 1456 1470 1493.333 1506.207 1544.827 1568
15 F 1440 1466.667 1500 1527.273 1542.857 1560 1575 1600 1613.793 1655.172 1680

Most harmonic tunings

Degrees Enneatonic Minor mode Middletown temperament Neutral mode Middletown temperament Major mode Middletown temperament
7/3±13¢ 22/9±13¢ 5/2±13¢
1 F#/Gb 96.925-98.658 102.294-104.027 104.888-106.621
2 G 193.8495-197.316 204.588-208.054 209.77-213.242
3 G#/Jb G#/Ab 290.774-295.974 306.8815-312.0815 314.663-319.863
4 J A 387.699-394.632 409.1755-416.109 419.559-426.484
5 A B 484.624-493.29 511.469-520.136 524.438-533.105
6 A#/Bb B#/Hb 581.548-591.948 613.763-624.163 629.3255-392.7255
7 B H 678.473-690.606 716.057-728.19 734.213-746.346
8 B#/Hb H#/Cb 775.398-789.2645 818.351-832.218 839.101-852.967
9 H C 872.3225-887.9225 920.645-936.245 943.988-959.588
10 C D 969.247-986.561 1022.939-1040.272 1048.876-1066.209
11 C#/Db D#/Sb 1066.172-1085.239 1125.2325-1144.299 1153.763-1172.83
12 D S 1163.097-1183.897 1227.526-1248.326 1258.651-1279.451
13 D#/Eb S#/Eb 1260.0215-1282.555 1329.82-1352.3535 1363.539-1386.072
14 E 1356.946-1381.213 1432.114-1456.381 1468.426-1492.693
15 F 1453.871-1479.871 1534.408-1560.408 1573.314-1599.314

Golden tunings

Minor mode Middletown temperament

Degrees Enneatonic Aeolian-Dorian Dorian
-13¢ Mean -13¢ (s5D) Subpental Pental Superpental
+13¢ (A-D) Mean +13¢ -13¢ -13¢ (S5) Mean Mean +13¢ (5) -13¢ (D-M)
1 F#/Gb 96.457 97.323 97.39 98.19 98.257 99.123 100.618 101.245 101.4845 102.1115 102.351 102.788
2 G 192.913 194.647 194.78 196.38 196.513 198.247 201.236 202.49 202.969 204.223 204.702 205.576
3 G#/Jb G#/Ab 289.37 291.97 292.17 294.57 294.77 297.37 301.854 303.734 304.454 306.334 307.054 308.365
4 J A 385.829 389.294 389.56 392.76 394.027 396.493 402.4715 404.979 405.938 408.446 409.405 411.153
5 A B 482.284 486.617 486.95 490.95 491.283 495.617 503.089 569.502 507.423 510.557 511.756 513.941
6 A#/Bb B#/Hb 578.74 583.94 584.334 589.14 589.54 594.74 603.707 607.469 608.907 612.669 614.107 616.729
7 B H 675.197 681.364 681.73 687.33 687.7965 693.863 704.325 708.7135 710.392 714.78 716.4585 719.5175
8 B#/Hb H#/Cb 771.654 778.587 779.12 785.52 786.053 792.9865 804.943 809.958 811.877 816.892 818.81 822.306
9 H C 868.1105 875.9105 876.51 883.7105 884.31 892.11 905.561 911.203 913.361 919.003 921.161 925.094
10 C D 964.567 973.234 973.9 981.901 982.5665 991.233 1006.179 1012.448 1014.8455 1021.115 1023.512 1027.882
11 C#/Db D#/Sb 1061.024 1070.557 1071.39 1080.091 1080.823 1090.356 1106.797 1113.693 1116.33 1123.226 1125.863 1130.67
12 D S 1157.481 1167.881 1168.68 1178.281 1179.08 1189.48 1207.4145 1214.9375 1217.8145 1225.3375 1228.2145 1233.459
13 D#/Eb S#/Eb 1253.937 1265.204 1266.07 1176.471 1277.336 1288.603 1308.032 1316.182 1319.299 1327.449 1330.566 1336.247
14 E 1350.394 1362.527 1363.46 1374.661 1375.593 1387.726 1408.65 1417.427 1420.783 1429.56 1432.917 1439.035
15 F 1446.851 1459.851 1460.85 1472.851 1473.85 1486.85 1509.268 1518.672 1522.268 1531.672 1535.268 1541.823

Neutral (Dorian-Mixolydian) mode Middletown temperament

Degrees Enneatonic +13¢ (S5D) Mean -13¢ (s5M)
1 F#/Gb 102.978 103.655 103.855
2 G 205.956 207.31 207.709
3 G#/Jb G#/Ab 308.934 310.965 311.564
4 J A 411.9215 414.6195 415.419
5 A B 514.891 518.274 519.2735
6 A#/Bb B#/Hb 617.869 621.929 623.128
7 B H 720.847 725.584 726.983
8 B#/Hb H#/Cb 823.825 829.239 830.8375
9 H C 926.823 932.893 934.693
10 C D 1029.781 1036.549 1038.547
11 C#/Db D#/Sb 1132.759 1140.204 1142.402
12 D S 1235.7375 1243.859 1246.256
13 D#/Eb S#/Eb 1338.716 1347.513 1353.111
14 E 1441.694 1451.168 1453.966
15 F 1544.672 1554.823 1557.82

Major mode Middletown temperament

Degrees Enneatonic Mixolydian Mixolydian-Ionian
Subpental Pental Superpental Mean +13¢
-13¢ (5) +13¢ (D-M) Mean Mean +13¢ (s5) +13¢ -13¢ (Soft s5) Soft Intense
+13¢ (Soft s5) -13¢ Mean -13¢ (M-I) +13¢
1 F#/Gb 104.306 104.5215 104.721 105.173 105.788 106.04 106.664 107.531 108.398 108.4245 109.291 109.6375 110.158 110.504 111.371
2 G 208.613 209.043 209.443 210.346 211.576 212.08 213.329 215.032 216.795 216.849 218.582 219.275 220.316 221.008 222.742
3 G#/Jb G#/Ab 312.919 313.565 314.164 315.519 317.364 318.119 319.993 322.593 325.193 325.273 327.873 328.913 330.473 331.613 334.113
4 J A 417.226 418.086 418.885 420.639 423.152 424.159 426.657 430.124 433.5905 433.698 437.1345 438.55 440.631 442.017 445.4835
5 A B 521.532 526.308 523.607 525.865 528.94 530.199 533.321 537.655 541.988 542.122 546.456 548.188 550.789 552.521 556.854
6 A#/Bb B#/Hb 625.8385 627.129 628.328 631.0385 634.728 636.238 639.987 645.186 650.386 650.547 655.747 657.825 660.947 663.025 668.225
7 B H 730.145 731.651 733.0495 736.212 740.516 742.278 746.65 752.717 758.783 758.971 765.038 767.463 771.105 773.5235 779.596
8 B#/Hb H#/Cb 834.451 836.172 837.771 841.385 846.304 853.314 899.98 867.181 914.605 867.396 874.329 877.1 881.262 884.033 890.967
9 H C 938.758 940.694 942.492 946.558 952.092 954.358 999.978 967.7785 1016.228 975.82 983.62 986.738 991.42 994.538 1002.338
10 C D 1043.064 1045.2155 1047.214 1051.731 1057.88 1060.3975 1066.643 1075.3095 1083.976 1084.245 1092.911 1096.3755 1101.578 1105.042 1113.709
11 C#/Db D#/Sb 1147.3705 1149.737 1151.935 1156.904 1163.668 1166.437 1173.307 1182.84 1192.374 1192.669 1202.202 1206.013 1211.736 1215.546 1225.08
12 D S 1251.677 1254.259 1256.656 1262.077 1269.456 1272.477 1279.971 1290.371 1300.771 1301.0395 1311.4935 1315.651 1321.8935 1326.051 1336.451
13 D#/Eb S#/Eb 1355.983 1358.78 1361.378 1367.25 1275.244 1378.517 1386.636 1397.902 1409.169 1409.518 1420.785 1438.993 1425.288 1436.555 1447.8215
14 E 1460.29 1463.302 1466.099 1472.423 1481.032 1484.556 1493.3 1505.433 1517.567 1517.9425 1530.076 1541.778 1534.926 1547.059 1559.192
15 F 1564.596 1567.96 1570.82 1577.596 1583.82 1590.596 1599.964 1612.964 1625.964 1626.366 1639.366 1644.563 1652.366 1657.563 1670.563

By a surprising coincidence, the 15ed of the Golden tenth (7φ+6)\(5φ^2)edo is almost exactly every third degree of 34edo. Additionally, those of the modal Golden tenths are almost exactly +1/28-syntonic comma 4ed(5/4) (Aeolian-Dorian), 9ed(5/3)/equal multiples of 18/17 (Subpental Dorian), 13ed(15/7) (Pental Dorian), 2ed(9/8) (Superpental Dorian), -1/12-syntonic comma 3ed(6/5) (Dorian-Mixolydian), 14ed(7/3)/equal multiples of 17/16/100π\3 cents (Subpental Mixolydian), 3ed(6/5) (Pental Mixolydian), -1/20-septimal comma 4ed(9/7)/-1/28-syntonic comma 14ed(12/5)/9ed(7/4) (Soft Superpental Mixolydian), 12ed(32/15) (Intense Superpental Mixolydian) and 8ed(5/3)/-1/9 schismic 9ed(16/9)/14ed(22/9) (Mixolydian-Ionian) respectively.