Hi, I have encountered a strange problem. I have created several of slideshows with added music saved as .wav. This made the final projects very large (90 to 100 MB). As I want to put these on a website I deleted the .wav file and replaced with the same music, but saved as a .mp3 file. This is where the problem started!!!!!. The .mp3 file was a shorter duration?????. Actual example: .wav was duration 7:24 when viewed in Adobe Audition. This file was then saved as mp3 and showed the same duration of 7:24. In P2E the "Music Tab" showed the .wav file as 7:24. All well so far. Removed .wav file and Added .mp3 file. Music duration now shows 6:55. When viewed in the Timeline window Music end is 6:55, but the Music duration (shown at the bottom of the Customise Sync window) is different again, showing 7:22. Obviously the sync of all the slides is now different etc. Am I going mad???? Can anyone offer any advice on how to remove the .wav files and insert an .mp3 file without any problems???? Any help / Advice would keep me sane. I have tried the same with a different slideshow, with similar results!!!! Very frustrated. CHAS