I get a popping sound (more of a crackle) on my video after exporting. It's never in the same spot and sometimes I get no noise at all. Sometimes the crackle sound happens on my time line and it will disapear while scrolling. I cannot pin down the issue. To get a good video I have to export it several times until there is no noise in the audio and I keep the good product. Some exports are good, some are bad. Apparently this is a known issue but none of the fixes I have read about worked for me. Some say this just a flaw with premiere pro. I have only noticed this issue in the last day.