Relative interval error: Difference between revisions

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m Linearity: correction
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Here is an example. The relative errors of 26edo in its 7-limit patent val is  
Here is an example. The relative errors of 26edo in its 5-limit patent val is  


<math>E_\text {r, 26} = \langle \begin{matrix} 0.00\% & -20.90\% & -37.01\% \end{matrix} ]</math>
<math>E_\text {r, 26} = \langle \begin{matrix} 0.00\% & -20.90\% & -37.01\% \end{matrix} ]</math>
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Another linearity is actually about the interval space {b}. This enables us to find the relative error of any ratio in a given tuning of an equal temperament.  
Another linearity is actually about the interval space {b}. This enables us to find the relative error of any ratio in a given tuning of an equal temperament.  


Let us try finding the relative error of 6/5 in 19edo's patent val. We first find the errors of 2/1, 3/1 and 5/1 in 19edo are 0, -11.43% and -11.66%, respectively. Since 6/5 = (2/1)(3/1) / (5/1), its error is 0 + (-11.43%) - (-11.66%) = 0.23%. That shows 19edo has fairly flat fifths and major thirds, yet they cancel out when it comes to minor thirds and results in a very accurate approximation.  
Let us try finding the relative error of 6/5 in 19edo's patent val. We first find the errors of 2/1, 3/1 and 5/1 in 19edo are 0, -11.43% and -11.66%, respectively. Since 6/5 = (2/1)(3/1) / (5/1), its error is 0 + (-11.43%) - (-11.66%) = 0.23%. That shows 19edo has fairly flat fifths and major thirds, yet they cancel out when it comes to minor thirds and results in a very accurate approximation.


== See also ==
== See also ==