"i cant see it anywhere" You mean you can't see the audio layer on the timeline? That seems odd... If you CAN, bump the audio up a bit on the timeline and save as a new file, then export. If that works, just pushing forward the timing of the audio track - great, just be sure it's in a duplicate file so it doesn't affect all the other versions on later publishing. If you can't see the audio track for some reason, and can't figure out how to adjust it at all in the course, two options: 1. Create a new project with the same overall project settings. Copy/paste all the content from the original into the new file, save, and publish. Maybe it's just something odd in the original file throwing off the timing, which happens. 2. Open the published video in something like Camtasia or Premiere and adjust the audio track to the video (i.e. bump the video track up a little) and republish the video. In other words, adjust the A/V sync in post-production
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