You must apply the atelier fix like most people here are saing https://github.com/doitsujin/atelier-sync-fix. FMV's would play but had no sound. To fix it go to the game folder, and inde ./Data/x64/ youl'll find multiple folders with .wmv files inside. Convert all of these files with Handbrake or any other video converting application and replace the originals. I used Handbrake defaults, MPEG-4 format, H264(x264) for the video encoder and AAC for audio encoder. Don't forget to change the converted file type to wmv, the name of the files should be exactly the same. After that everything works perfectly.