I'm a student trying to learn PP and I was just trying to figure out how to do this the other day. I ended up just layering another audio level to it with a delay of a couple frames. I'll try to use your instructions in the future. Most of the problems come from not knowing what the questions are to ask (or how to word it), and what the reverb effect means in transitions or something.
It took me a while to figure out the proper way to do this because I was always thinking it was an echo effect when really it is a reverb effect. And then that reverb effect causes echo in way. But this method works every time to get that effect!
