# ~

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The **~** (tilde) sign when attached to a ratio is commonly used to mean *tempered*. For example, the generator of the meantone temperament can be denoted by ~3/2.

When it is used to connect multiple ratios, it means that the ratios are *tempered together*. For example, the whole tone in the meantone temperament can be denoted by 9/8~10/9.