112edo
← 111edo | 112edo | 113edo → |
112 equal divisions of the octave (abbreviated 112edo), or 112-tone equal temperament (112tet), 112 equal temperament (112et) when viewed under a regular temperament perspective, is the tuning system that divides the octave into 112 equal parts of about 10.7 ¢ each. Each step represents a frequency ratio of 21/112, or the 112 root of 2.
Theory
112edo has two great perfect fifths, the lower of which approximates 1/4-comma meantone (just a tad lower), and the upper of which- the patent fifth- is identical to the perfect fifth of 56edo, a great inverse gentle fifth where +5 fifths gives a near-just 28:27 while -8 fifths gives a near-just 32:39 (identical to 2 degrees of 7edo) and +9 fifths gives a close approximation to 17:21.
One can form a 17-tone circle by taking 15 large fifths and 2 small fifths, as above, which gives some nice interval shadings a wee bit different from 17edo, but sharing a similar structure.
Odd harmonics
Harmonic | 3 | 5 | 7 | 9 | 11 | 13 | 15 | 17 | 19 | 21 | 23 | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Error | absolute (¢) | +5.19 | -0.60 | -4.54 | -0.34 | -4.89 | -4.81 | +4.59 | +2.19 | +2.49 | +0.65 | +3.87 |
relative (%) | +48 | -6 | -42 | -3 | -46 | -45 | +43 | +20 | +23 | +6 | +36 | |
Steps (reduced) |
178 (66) |
260 (36) |
314 (90) |
355 (19) |
387 (51) |
414 (78) |
438 (102) |
458 (10) |
476 (28) |
492 (44) |
507 (59) |
Intervals
Steps | Cents | Ups and downs notation (dual flat fifth 65\112) |
Ups and downs notation (dual sharp fifth 66\112) |
Approximate ratios |
---|---|---|---|---|
0 | 0 | D | D | 1/1 |
1 | 10.7143 | ^D, v3Ebb | ^D, v5Eb | |
2 | 21.4286 | ^^D, vvEbb | ^^D, v4Eb | |
3 | 32.1429 | ^3D, vEbb | ^3D, v3Eb | 56/55 |
4 | 42.8571 | ^4D, Ebb | ^4D, vvEb | 40/39 |
5 | 53.5714 | ^5D, v6Eb | ^5D, vEb | 33/32 |
6 | 64.2857 | ^6D, v5Eb | ^6D, Eb | 26/25 |
7 | 75 | D#, v4Eb | ^7D, v13E | |
8 | 85.7143 | ^D#, v3Eb | ^8D, v12E | 21/20 |
9 | 96.4286 | ^^D#, vvEb | ^9D, v11E | 55/52 |
10 | 107.143 | ^3D#, vEb | ^10D, v10E | 52/49 |
11 | 117.857 | ^4D#, Eb | ^11D, v9E | |
12 | 128.571 | ^5D#, v6E | ^12D, v8E | 14/13 |
13 | 139.286 | ^6D#, v5E | ^13D, v7E | |
14 | 150 | Dx, v4E | D#, v6E | |
15 | 160.714 | ^Dx, v3E | ^D#, v5E | |
16 | 171.429 | ^^Dx, vvE | ^^D#, v4E | |
17 | 182.143 | ^3Dx, vE | ^3D#, v3E | 49/44 |
18 | 192.857 | E | ^4D#, vvE | 28/25 |
19 | 203.571 | ^E, v3Fb | ^5D#, vE | 55/49 |
20 | 214.286 | ^^E, vvFb | E | |
21 | 225 | ^3E, vFb | ^E, v5F | 25/22 |
22 | 235.714 | ^4E, Fb | ^^E, v4F | |
23 | 246.429 | ^5E, v6F | ^3E, v3F | |
24 | 257.143 | ^6E, v5F | ^4E, vvF | 65/56 |
25 | 267.857 | E#, v4F | ^5E, vF | |
26 | 278.571 | ^E#, v3F | F | 75/64 |
27 | 289.286 | ^^E#, vvF | ^F, v5Gb | 13/11, 77/65 |
28 | 300 | ^3E#, vF | ^^F, v4Gb | 25/21 |
29 | 310.714 | F | ^3F, v3Gb | |
30 | 321.429 | ^F, v3Gbb | ^4F, vvGb | |
31 | 332.143 | ^^F, vvGbb | ^5F, vGb | 40/33 |
32 | 342.857 | ^3F, vGbb | ^6F, Gb | 39/32 |
33 | 353.571 | ^4F, Gbb | ^7F, v13G | |
34 | 364.286 | ^5F, v6Gb | ^8F, v12G | |
35 | 375 | ^6F, v5Gb | ^9F, v11G | |
36 | 385.714 | F#, v4Gb | ^10F, v10G | 5/4 |
37 | 396.429 | ^F#, v3Gb | ^11F, v9G | 44/35 |
38 | 407.143 | ^^F#, vvGb | ^12F, v8G | |
39 | 417.857 | ^3F#, vGb | ^13F, v7G | 14/11 |
40 | 428.571 | ^4F#, Gb | F#, v6G | 32/25, 50/39 |
41 | 439.286 | ^5F#, v6G | ^F#, v5G | |
42 | 450 | ^6F#, v5G | ^^F#, v4G | 13/10 |
43 | 460.714 | Fx, v4G | ^3F#, v3G | |
44 | 471.429 | ^Fx, v3G | ^4F#, vvG | 21/16 |
45 | 482.143 | ^^Fx, vvG | ^5F#, vG | 33/25 |
46 | 492.857 | ^3Fx, vG | G | 65/49 |
47 | 503.571 | G | ^G, v5Ab | |
48 | 514.286 | ^G, v3Abb | ^^G, v4Ab | 35/26 |
49 | 525 | ^^G, vvAbb | ^3G, v3Ab | |
50 | 535.714 | ^3G, vAbb | ^4G, vvAb | |
51 | 546.429 | ^4G, Abb | ^5G, vAb | |
52 | 557.143 | ^5G, v6Ab | ^6G, Ab | |
53 | 567.857 | ^6G, v5Ab | ^7G, v13A | |
54 | 578.571 | G#, v4Ab | ^8G, v12A | 7/5 |
55 | 589.286 | ^G#, v3Ab | ^9G, v11A | |
56 | 600 | ^^G#, vvAb | ^10G, v10A | |
57 | 610.714 | ^3G#, vAb | ^11G, v9A | |
58 | 621.429 | ^4G#, Ab | ^12G, v8A | 10/7 |
59 | 632.143 | ^5G#, v6A | ^13G, v7A | |
60 | 642.857 | ^6G#, v5A | G#, v6A | |
61 | 653.571 | Gx, v4A | ^G#, v5A | |
62 | 664.286 | ^Gx, v3A | ^^G#, v4A | |
63 | 675 | ^^Gx, vvA | ^3G#, v3A | 65/44 |
64 | 685.714 | ^3Gx, vA | ^4G#, vvA | 52/35 |
65 | 696.429 | A | ^5G#, vA | |
66 | 707.143 | ^A, v3Bbb | A | |
67 | 717.857 | ^^A, vvBbb | ^A, v5Bb | 50/33 |
68 | 728.571 | ^3A, vBbb | ^^A, v4Bb | 32/21 |
69 | 739.286 | ^4A, Bbb | ^3A, v3Bb | |
70 | 750 | ^5A, v6Bb | ^4A, vvBb | 20/13 |
71 | 760.714 | ^6A, v5Bb | ^5A, vBb | |
72 | 771.429 | A#, v4Bb | ^6A, Bb | 25/16, 39/25 |
73 | 782.143 | ^A#, v3Bb | ^7A, v13B | 11/7 |
74 | 792.857 | ^^A#, vvBb | ^8A, v12B | |
75 | 803.571 | ^3A#, vBb | ^9A, v11B | 35/22 |
76 | 814.286 | ^4A#, Bb | ^10A, v10B | 8/5 |
77 | 825 | ^5A#, v6B | ^11A, v9B | |
78 | 835.714 | ^6A#, v5B | ^12A, v8B | |
79 | 846.429 | Ax, v4B | ^13A, v7B | |
80 | 857.143 | ^Ax, v3B | A#, v6B | 64/39 |
81 | 867.857 | ^^Ax, vvB | ^A#, v5B | 33/20 |
82 | 878.571 | ^3Ax, vB | ^^A#, v4B | |
83 | 889.286 | B | ^3A#, v3B | |
84 | 900 | ^B, v3Cb | ^4A#, vvB | 42/25 |
85 | 910.714 | ^^B, vvCb | ^5A#, vB | 22/13 |
86 | 921.429 | ^3B, vCb | B | |
87 | 932.143 | ^4B, Cb | ^B, v5C | |
88 | 942.857 | ^5B, v6C | ^^B, v4C | |
89 | 953.571 | ^6B, v5C | ^3B, v3C | |
90 | 964.286 | B#, v4C | ^4B, vvC | |
91 | 975 | ^B#, v3C | ^5B, vC | 44/25 |
92 | 985.714 | ^^B#, vvC | C | |
93 | 996.429 | ^3B#, vC | ^C, v5Db | |
94 | 1007.14 | C | ^^C, v4Db | 25/14 |
95 | 1017.86 | ^C, v3Dbb | ^3C, v3Db | |
96 | 1028.57 | ^^C, vvDbb | ^4C, vvDb | |
97 | 1039.29 | ^3C, vDbb | ^5C, vDb | |
98 | 1050 | ^4C, Dbb | ^6C, Db | |
99 | 1060.71 | ^5C, v6Db | ^7C, v13D | |
100 | 1071.43 | ^6C, v5Db | ^8C, v12D | 13/7 |
101 | 1082.14 | C#, v4Db | ^9C, v11D | |
102 | 1092.86 | ^C#, v3Db | ^10C, v10D | 49/26 |
103 | 1103.57 | ^^C#, vvDb | ^11C, v9D | |
104 | 1114.29 | ^3C#, vDb | ^12C, v8D | 40/21 |
105 | 1125 | ^4C#, Db | ^13C, v7D | |
106 | 1135.71 | ^5C#, v6D | C#, v6D | 25/13 |
107 | 1146.43 | ^6C#, v5D | ^C#, v5D | 64/33 |
108 | 1157.14 | Cx, v4D | ^^C#, v4D | 39/20 |
109 | 1167.86 | ^Cx, v3D | ^3C#, v3D | 55/28 |
110 | 1178.57 | ^^Cx, vvD | ^4C#, vvD | |
111 | 1189.29 | ^3Cx, vD | ^5C#, vD | |
112 | 1200 | D | D | 2/1 |