I'm new to After Effects, but my experience with video editing so far has been that audio and video are treated separately. When I add an mp4 to my composition, I get the video element, but I can't figure out where the audio is at. When I hit play on the preview toobar, the audio does not play. I checked to make sure "mute audio" wasn't enabled.
I'm sure it's something simple, I just need to be pointed in the right direction.