266edo

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← 265edo 266edo 267edo →
Prime factorization 2 × 7 × 19
Step size 4.51128¢ 
Fifth 156\266 (703.759¢) (→78\133)
Semitones (A1:m2) 28:18 (126.3¢ : 81.2¢)
Dual sharp fifth 156\266 (703.759¢) (→78\133)
Dual flat fifth 155\266 (699.248¢)
Dual major 2nd 45\266 (203.008¢)
Consistency limit 7
Distinct consistency limit 7

266 equal divisions of the octave (abbreviated 266edo or 266ed2), also called 266-tone equal temperament (266tet) or 266 equal temperament (266et) when viewed under a regular temperament perspective, is the tuning system that divides the octave into 266 equal parts of about 4.51 ¢ each. Each step represents a frequency ratio of 21/266, or the 266th root of 2.

It is part of the optimal ET sequence for the decimaleap, dodecacot, gentle, kujuku, parapyth, parapythic, pentacircle, quintannic, sruti and starlingtet temperaments.

Odd harmonics

Approximation of odd harmonics in 266edo
Harmonic 3 5 7 9 11 13 15 17 19 21 23
Error Absolute (¢) +1.80 +1.66 +1.10 -0.90 -0.94 -1.43 -1.05 -1.20 +0.23 -1.61 -1.21
Relative (%) +40.0 +36.7 +24.4 -20.0 -20.9 -31.7 -23.3 -26.5 +5.1 -35.6 -26.7
Steps
(reduced)
422
(156)
618
(86)
747
(215)
843
(45)
920
(122)
984
(186)
1039
(241)
1087
(23)
1130
(66)
1168
(104)
1203
(139)


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