No, we don't make any changes to the audio files at all. Have you confirmed that they're actually not loading via your browser's debugging tools? You can also post the site you're working on so that we can take a look ourselves.
Sorry, I did not mean change the audio files, just keeping the audio files in it when the edge is changed into an .oam. I have also noticed that external images no longer work in the new edge when using the .oam. I am just playing around with things to make sure what I want is possible. So here is a test page of my Wordpress (http://www.katelynmcd.com/test/) with an edge in it. There should be an autoplay of a sound track on it and an svg and png in the middle. None of those are loading. I hope that all made sense.