try rendering the whole thing first off... second off.. make sure the decibles (idk how to spell) doesnt exceed -12 db on the audio thing... if it does lower it.. this can be the cause.. or there is a "clap" in the audio track... which is kinda likea spike, try lowering that spike for the pop you hear, bringin that one wave length down soo u dont hear the pop...
i noticed the mind games icon, and the quote in the sig... good to see more rollers on other boards besides bemag ... lol