I have an audio at the starting scene just at the beginning of the main timeline and it was working ok with Chrome and Safari browsers but now it has stopped working with Chrome (this in the final HTML5 file with its hypersources) while it continues to work with Safari. Every other audio works. All are mp3. I have tried with and without the preloading option and I have changed the audio with no results: the same behaviour with the browsers. What surprises me is that the sound works with the preview mode in Chrome. Am I doing something wrong to produce my HTML5?