354edo

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← 353edo354edo355edo →
Prime factorization 2 × 3 × 59
Step size 3.38983¢
Fifth 207\354 (701.695¢) (→69\118)
Semitones (A1:m2) 33:27 (111.9¢ : 91.53¢)
Consistency limit 9
Distinct consistency limit 9

354 equal divisions of the octave (354edo), or 354-tone equal temperament (354tet), 354 equal temperament (354et) when viewed from a regular temperament perspective, is the tuning system that divides the octave into 354 equal parts of about 3.39 ¢ each.

Theory

354edo is enfactored in the 5-limit, with the same tuning as 118edo, defined by tempering out the schisma and the parakleisma, but the approximation to higher harmonics are much improved. In the 7-limit, the equal temperament tempers out 118098/117649 (stearnsma), 250047/250000 (landscape comma), and 703125/702464 (meter); in the 11-limit, 540/539, and 4000/3993; in the 13-limit, 729/728, 1575/1573, 1716/1715, 2080/2079, 4096/4095, and 4225/4224. It provides the optimal patent val for stearnscape, the 72 & 282 temperament, and 13- and 17-limit terminator, the 171 & 183 temperament.

Prime harmonics

Approximation of prime harmonics in 354edo
Harmonic 2 3 5 7 11 13 17 19 23 29 31
Error absolute (¢) +0.00 -0.26 +0.13 +0.67 +1.22 +0.15 +0.13 +0.79 -1.16 +0.93 +0.73
relative (%) +0 -8 +4 +20 +36 +4 +4 +23 -34 +27 +21
Steps
(reduced)
354
(0)
561
(207)
822
(114)
994
(286)
1225
(163)
1310
(248)
1447
(31)
1504
(88)
1601
(185)
1720
(304)
1754
(338)

Subsets and supersets

Since 354 factors into 2 × 3 × 59, 354edo has subset edos 2, 3, 6, 59, 118, and 177.

Regular temperament properties

Subgroup Comma List Mapping Optimal
8ve Stretch (¢)
Tuning Error
Absolute (¢) Relative (%)
2.3.5.7 32805/32768, 118098/117649, 250047/250000 [354 561 822 994]] -0.0319 0.1432 4.23
2.3.5.7.11 540/539, 4000/3993, 32805/32768, 137781/137500 [354 561 822 994 1225]] -0.0963 0.1817 5.36
2.3.5.7.11.13 540/539, 729/728, 1575/1573, 4096/4095, 31250/31213 [354 561 822 994 1225 1310]] -0.0871 0.1671 4.93
2.3.5.7.11.13.17 540/539, 729/728, 936/935, 1156/1155, 1575/1573, 4096/4095 [354 561 822 994 1225 1310 1447]] -0.0791 0.1559 4.60
2.3.5.7.11.13.17.19 540/539, 729/728, 936/935, 969/968, 1156/1155, 1445/1444, 1521/1520 [354 561 822 994 1225 1310 1447 1504]] -0.0926 0.1509 4.43

Rank-2 temperaments

Note: 5-limit temperaments supported by 118et are not included.

Table of rank-2 temperaments by generator
Periods
per 8ve
Generator* Cents* Associated
Ratio*
Temperaments
2 128\354
(49\354)
433.90
(166.10)
9/7
(11/10)
Pogo
3 147\354
(29\354)
498.31
(98.31)
4/3
(18/17)
Term / terminator
6 64\354
(5\354)
216.95
(16.95)
17/15
(245/243)
Stearnscape
6 147\354
(29\354)
498.31
(98.31)
4/3
(18/17)
Semiterm
118 167\354
(2\354)
566.101
(6.78)
165/119
(?)
Oganesson

* octave-reduced form, reduced to the first half-octave, and minimal form in parentheses if it is distinct