A transition between two songs sounds much better, if their beats are in sync. This is only possible, if both songs have the same tempo.
In this tutorial, you learn a quick and reliable way to match the tempo of two songs and align their beats properly
This is more a breakdown than a full detail tutorial. I want to give you an idea how you can animate a rigged character
in After Effects with BeatEdit for After Effects. The bassist character we use here has been created by Tobias Hart aka 2biasMotion
In this tutorial you learn how repeat any animation in After Effects easily at each marker. You first keyframe the animation and then you apply an expression that plays back those keyframes at each marker.