User:MisterShafXen/6ed9/7

From Xenharmonic Wiki
Revision as of 10:36, 27 July 2025 by MisterShafXen (talk | contribs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search

6 equal divisions of 9/7 (abbreviated 6ed9/7) is a nonoctave tuning system that divides the interval of 9/7 into 6 equal parts of about 72.5 ¢ each. Each step represents a frequency ratio of (9/7)1/6, or the 6th root of 9/7.

← 5ed9/7 6ed9/7 7ed9/7 →
Prime factorization 2 × 3
Step size 72.514 ¢ 
Octave 17\6ed9/7 (1232.74 ¢)
Twelfth 26\6ed9/7 (1885.36 ¢) (→ 13\3ed9/7)
Consistency limit 2
Distinct consistency limit 2
Special properties

Theory

This tuning tempers out 21/20 in the 7-limit, 55/54 in the 11-limit, 27/26, 55/52, and 16/13 in the 13-limit, 17/16 and 17/13 in the 17-limit, and 38/33 in the 19-limit.

Harmonics

Approximation of harmonics in 6ed9/7
Harmonic 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
Error Absolute (¢) +32.7 -16.6 -7.0 -30.8 +16.1 -33.2 +25.7 -33.2 +2.0 -18.0 -23.6 -17.2 -0.4 +25.1 -14.1 +26.0 -0.4 -21.5 +34.7 +22.7
Relative (%) +45.1 -22.9 -9.7 -42.4 +22.3 -45.8 +35.4 -45.8 +2.7 -24.8 -32.6 -23.7 -0.6 +34.7 -19.4 +35.9 -0.6 -29.7 +47.8 +31.4
Steps
(reduced)
17
(5)
26
(2)
33
(3)
38
(2)
43
(1)
46
(4)
50
(2)
52
(4)
55
(1)
57
(3)
59
(5)
61
(1)
63
(3)
65
(5)
66
(0)
68
(2)
69
(3)
70
(4)
72
(0)
73
(1)