695edo: Difference between revisions

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The ''695 equal division'' divides the octave into 695 equal parts of 1.727 cents each. In the 5-limit it tempers out the escapade comma, |32 -7 -9>; in the 7-limit it tempers out 10976/10935 and 200120949/200000000, and provides the [[Optimal_patent_val|optimal patent val]] for the hemimage planar temperament, tempering out 10976/10935.
{{Infobox ET}}
{{ED intro}}
 
695edo is only [[consistent]] to the [[5-odd-limit]] and the error of [[harmonic]] [[3/1|3]] is quite large. The equal temperament is most notable for [[tempering out]] [[10976/10935]], providing the [[optimal patent val]] for the [[hemimage]] temperament. It also tempers out the [[escapade comma]], {{monzo| 32 -7 -9 }} in the 5-limit; and {{monzo| 27 0 -8 -3}} and {{monzo| -9 5 -8 7 }} in the 7-limit.
 
=== Odd harmonics ===
{{Harmonics in equal|695}}
 
=== Subsets and supersets ===
Since 695 factors into {{factorization|695}}, 695edo contains [[5edo]] and [[139edo]] as subsets.  
 
[[Category:Hemimage]]

Latest revision as of 15:50, 20 February 2025

← 694edo 695edo 696edo →
Prime factorization 5 × 139
Step size 1.72662 ¢ 
Fifth 407\695 (702.734 ¢)
Semitones (A1:m2) 69:50 (119.1 ¢ : 86.33 ¢)
Dual sharp fifth 407\695 (702.734 ¢)
Dual flat fifth 406\695 (701.007 ¢)
Dual major 2nd 118\695 (203.741 ¢)
Consistency limit 5
Distinct consistency limit 5

695 equal divisions of the octave (abbreviated 695edo or 695ed2), also called 695-tone equal temperament (695tet) or 695 equal temperament (695et) when viewed under a regular temperament perspective, is the tuning system that divides the octave into 695 equal parts of about 1.73 ¢ each. Each step represents a frequency ratio of 21/695, or the 695th root of 2.

695edo is only consistent to the 5-odd-limit and the error of harmonic 3 is quite large. The equal temperament is most notable for tempering out 10976/10935, providing the optimal patent val for the hemimage temperament. It also tempers out the escapade comma, [32 -7 -9 in the 5-limit; and [27 0 -8 -3 and [-9 5 -8 7 in the 7-limit.

Odd harmonics

Approximation of odd harmonics in 695edo
Harmonic 3 5 7 9 11 13 15 17 19 21 23
Error Absolute (¢) +0.779 +0.449 -0.193 -0.169 -0.527 +0.336 -0.499 +0.368 -0.535 +0.586 +0.215
Relative (%) +45.1 +26.0 -11.2 -9.8 -30.5 +19.4 -28.9 +21.3 -31.0 +33.9 +12.4
Steps
(reduced)
1102
(407)
1614
(224)
1951
(561)
2203
(118)
2404
(319)
2572
(487)
2715
(630)
2841
(61)
2952
(172)
3053
(273)
3144
(364)

Subsets and supersets

Since 695 factors into 5 × 139, 695edo contains 5edo and 139edo as subsets.