Hi, Thanks for responding. The problem doesn't appear to be in Audacity as, when I export the project (which has multiple tracks) as an ogg vorbis file, and save it in place of the file identified in PtoE, the soundtrack is updated but the visible waveform isn't - it remains as before. This means that when I'm looking at the waveform, identifying the silences or crescendoes, etc., they are not synchronised with the soundtrack itself. When the PtoE project is saved and closed, the updated waveform appears when it is re-opened. At present I am working on Windows XP. Previously I've compressed my soundtracks, in Audacity, as MP3s but, because I've not yet downloaded an updated lame MP3 encoder I've been using ogg vorbis ............. might this have some bearing on the problem? Hope I've clarified things a little more, Sheila G.