Thanks Igor for your help. In response: 1. The 25 seconds of silence at the begining is deliberate. 2. However, if I turn on the "Synchronize music and slides" option in the main tab (which I had tried earlier), I get a message "When you use 'Sychronize music and slides' option, you cannot use personal playlists of slides" and nothing happens when I try the "toast" button or the preview button, unless I turn it off again. 3. I apologize but I don't know what you mean by the "slide properties" window. I don't have such a window, either in the main interface or in the pulldown list under "Slide" at the top left of the screen. In any event, I had already removed the audio file for slide 32 using the project options interface and it doesn't show either there or under the "add sound" button at the top right of the screen. Perhaps I hadn't done this in the version I sent you but, irrespective of this, I still have the same problem: no sound after slide 32 when I run it full screen and no sound at all when I hit the "toast' button. This may be a stupid question, but perhaps my download was corrupted and I need to do a new download? (This is only my second AV show and the earlier one where I had no problem was done on an earlier version of PTE)