EW Hollywood Brass have at least two keyswitch patches in every instrument.  Some of the other Hollywood libraries also have keyswitched patches. This linked article uses Cinematic Strings as an example but the same general technique can be applied to Hollywood.  https://medium.com/pragmatic-sound/how-to-create-expression-maps-for-cinematic-studio-strings-ae8963cf1896 The general strategy would be to  load all of the target keyswitch patches in one instance of Play, each with a differe