# Error

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**Error** is a measurement of the deviation of an interval from another interval that it is approximating. The retronym *absolute error* is sometimes used to contrast it with relative error.

For example, the tempered ~3/2 of quarter-comma meantone is 696.578¢, while a just 3/2 is 701.955¢, so the error of this ~3/2 is 696.578¢ - 701.955¢ = -5.377¢.

In Paul Erlich's Middle Path paper, error is called *mistuning*.

## See also

- Damage, a measurement of how much an interval deviates from another interval it is approximating: the absolute value of error (that has possibly been weighted)
- Dave Keenan & Douglas Blumeyer's guide to RTT: tuning fundamentals#Damage, error, and weight: for a discussion of error with respect to damage and weight
- TE error