Introducing a per-variation or per-song-part transition time for each widget within their properties could nicely make this Introducing a per-variation or per-song-part transition time for each widget within their properties could effectively resolve the issue. While this behavior can already be achieved using GPScript—by employing a helper widget to store the target value and a script to handle the smooth interpolation of the real widget—it would be great to have native support for smooth widget transitions. 
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