I can't find double tilde (~~) in the user manual, but the manual does talk about the single tilde.

Allow RealTracks substitutions based on tempo
When set, the program will find the best RealTracks to use at the current tempo. For example, it might substitute an acoustic bass recorded at a higher tempo, closer to the tempo of your song. The RealTracks name will appear on the main screen with a tilde (~) to indicate the substitution.


John

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