Sorry for delay in replying, I have now found the reason for 52 sec. I made a show of 13 slides at 4 sec. display therefoe52sec duration, I then added music of 2 min 50sec and pressed sync slides to music. In preview mode the shoe lasted 2 min 50 so I tried to burn to DVD and also AVI but both would only burn for 52 secs. When I opened the timeline it showed slide duration as 4 sec each, so I increased slide duration to 13 secs. I.e. 2min 49 duration. Unchecked the sync to music box and then burned a DVD to full duration with perfect result. I thought that checking the sync to music automatically changed the slide display time. George