170edt

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← 169edt170edt171edt →
Prime factorization 2 × 5 × 17
Step size 11.188¢ 
Octave 107\170edt (1197.11¢)
Consistency limit 2
Distinct consistency limit 2

170 equal divisions of the tritave, perfect twelfth, or 3rd harmonic (abbreviated 170edt or 170ed3), is a nonoctave tuning system that divides the interval of 3/1 into 170 equal parts of about 11.2 ¢ each. Each step represents a frequency ratio of 31/170, or the 170th root of 3.

Harmonics

Approximation of prime harmonics in 170edt
Harmonic 2 3 5 7 11 13 17 19 23
Error Absolute (¢) -2.89 +0.00 -0.51 -1.25 -0.58 +1.10 -4.62 +4.20 -2.11
Relative (%) -25.8 +0.0 -4.5 -11.1 -5.2 +9.8 -41.3 +37.6 -18.8
Steps
(reduced)
107
(107)
170
(0)
249
(79)
301
(131)
371
(31)
397
(57)
438
(98)
456
(116)
485
(145)
Approximation of odd harmonics in 170edt
Harmonic 25 27 29 31 33 35 37 39 41 43 45
Error Absolute (¢) -1.02 +0.00 -0.64 -4.22 -0.58 -1.76 +2.73 +1.10 +4.02 -0.12 -0.51
Relative (%) -9.1 +0.0 -5.8 -37.7 -5.2 -15.7 +24.4 +9.8 +35.9 -1.1 -4.5
Steps
(reduced)
498
(158)
510
(0)
521
(11)
531
(21)
541
(31)
550
(40)
559
(49)
567
(57)
575
(65)
582
(72)
589
(79)