How to synchronize background music and story?
To make background music sync with story, you have many ways to achieve the task. To make the background music start at specified place, just switch to Timeline mode and drag the music thumbnail to the position you want. In the event that the added music file is longer than the story length, you could trim the music by dragging the right end to left to cut the music or drag the right end of segment to prolong the length of story. In case that your story is longer than the music length, the rest of the story will be silent. Therefore, it’s recommended you choose a more suitable music file according to the length of story, or shorten the length of story through the method described above, or even delete some photos.