I have a good wav file. It plays in windows media player and it renders in Premiere CS4. In AE CS4, when I RAM preview, using zero on the num pad, it previews sound, but everything is waaaaaaay toooooo slooooooooow. When I render in AE, I get nothing when I play the AVI in windows media player.
I'm working with a single composition project with a single sound file.
Have you checked your audio prefs? Sounds like they aren't right. Also check your audio devices. AE does not particulalrly like resampling on the fly, so any fancies should be turned off and the sampel rate match that of what you use in the sound file.