"... the real strength of these tutorials isn’t in the audio part of that instruction; it’s in the linking part.
Andrew shows very clearly and methodically how to use expressions (specifically the linear expression method), the expression pick whip, null object layers, expression control effects… all of which are immensely powerful and crucial features. Unfortunately, these same features are usually very intimidating for new users.
In other words, I think that Andrew may be selling himself short by saying that these are tutorials about something as easy to do as converting audio to keyframes. In fact, they are great resources for teaching some of the most important and universally useful features to help someone to move from the basics into doing seriously complex and advanced work in After Effects."
Read the rest, with the proper links, at After Effects region of interest.