Ed11/9
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The equal division of 11/9 (ed11/9) is a tuning obtained by dividing the undecimal neutral third (11/9) in a certain number of equal steps.
ED11/9 tuning systems that accurately represent the intervals 11/10 and 10/9 include: 19ed11/9 (0.44 cent error), 21ed7/5 (0.43 cent error), and 40ed5/3 (0.01 cent error).
19ed11/9, 21ed11/9 and 40ed11/9 are to the division of 11/9 what:
- 17ed5/4, 19ed5/4, and 36ed5/4 are to the division of 5/4
- what 15ed9/7, 17ed9/7, and 32ed9/7 are to the division of 9/7
- what 13ed4/3, 15ed4/3, and 28ed4/3 are to the division of 4/3
- what 11ed7/5, 13ed7/5, and 24ed7/5 are to the division of 7/5
- what 9ed3/2, 11ed3/2, and 20ed3/2 are to the division of 3/2
- what 7ed5/3, 9ed5/3, and 16ed5/3 are to the division of 5/3
- and what 5edo, 7edo, and 12edo are to the division of 2/1.
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