16ed5/2

Revision as of 19:04, 7 May 2023 by Cmloegcmluin (talk | contribs) ("optimal GPV sequence" → "optimal ET sequence", per Talk:Optimal_ET_sequence)
← 15ed5/2 16ed5/2 17ed5/2 →
Prime factorization 24
Step size 99.1446 ¢ 
Octave 12\16ed5/2 (1189.74 ¢) (→ 3\4ed5/2)
Twelfth 19\16ed5/2 (1883.75 ¢)
(semiconvergent)
Consistency limit 11
Distinct consistency limit 6

16ED5/2 is the equal division of the 5/2 interval into 16 parts of 99.1446 cents each. This is the scale which occurs as the dominant reformed Mixolydian mode tuned as an equal division of a just interval.

Intervals

Degrees Enneatonic Cents
1 1#/2b F#/Gb 99.145
2 2 G 198.289
3 2#/3b G#/Jb G#/Ab 297.433
4 3 J A 396.578
5 3#/4b J#/Ab A#/Bb 495.723
6 4 A B 594.868
7 5 B H 694.012
8 5#/6b B#/Hb H#/Cb 793.157
9 6 H C 892.3015
10 6#/7b H#/Cb C#/Db 991.446
11 7 C D 1090.591
12 7#/8b C#/Db D#/Sb 1189.735
13 8 D S 1288.88
14 8#/9b D#/Eb S#/Eb 1388.0245
15 9 E 1487.169
16 1 F 1586.314

Coincidentally, 133 steps of the pyrite EDX of this size exceed 11 octaves by only 2.978¢.

Regular temperaments

16ed5/2 can also be thought of as a generator of the 2.3.5.17.19 subgroup temperament which tempers out 256/255, 361/360, and 4624/4617, which is a cluster temperament with 12 clusters of notes in an octave (quintaleap temperament). This temperament is supported by 12-, 109-, 121-, 133-, 145-, and 157edo.

Tempering out 400/399 (equating 20/19 and 21/20) leads to quintupole (12&121), and tempering out 476/475 (equating 19/17 with 28/25) leads to quinticosiennic (12&145).

Another temperament related to 16ed5/2 is quintapole (12&85). It is practically identical to the Galilei tuning, which is generated by the ratios 2/1 and 18/17.

See also