You may want to experiment with rendering your midi file to audio and and having the ACW create a tempo map. I have no idea how accurate that will work for classical music but it works like a champ for easy listening, rock and country that's normally a single time signature. There is a tutorial video about creating a click track in RealBand and creating a click track may be a useful first step to identify areas that have different time signatures if that's applicable to your song project.


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