I've just set up the trial versin of Snap which seems pretty good. I've imported mp3 files for the narration of each slide from a previous version of the presentation. In preview mode, and when I view the presentation on a web page, there's a stutter on the first slide, i.e. it starts and quickly restarts. I've checked the original audio file and there's no stutter there, so it's happening in Snap. Any suggestions?
