I am trying to learn how to make a transition either from one song to another or using the same song. For example, there is a group of people called the Anthem Kingz. They create remixes and use multiple BMP's on the same track. I want to learn how to do this because I have many ideas that will help improve my performance. What program do I need, and how do you lay different tempos thru multiple tracks on, say for instance, logic express?