I don’t know of any tutorials, the effect is very basic. Controls for volume and panning, both that can be keyframed. AE, really isn’t much for audio, just a few basic effects.
If it isn’t too complicated, the audio window(cntl + 4, not keyframable, controls overall volume of a layer) and the “stereo mixer” will handle the basics, after that you need audition and a sound guy(least I do).
Johnny Cuevas, Editor