Using Movie Edit Pro v.18.104.22.168 with Win10 but have also had this problem in earlier versions of MEP. When I import an old Sony hi8 video, the video is fine but the audio is corrupt and noise so loud you can't understand it - sounds like the film sprocket sounds that you used to hear on 16mm projectors. Really loud. The file plays fine on other video players with normal sound. I was thinking this might be a codec problem but why would it play ok on other software? This is the only video editor I've chosen to purchase and tech support has been unresponsive. Attached is a sample video clip but it might sound ok on your machine with your codecs. Any ideas?