Repeating Audio
Sometimes, if the video and audio in your timeline come from separate files, the duration of the audio can be shorter than the video. Stretching the audio to match the video’s duration is not always a good idea—it slows down the audio. Select Tools > Repeat Audio to duplicate the audio along the timeline until it matches the duration of the video track. If you have a video track that is five minutes long and an audio track that is one minute long, choosing the ‘Repeat Audio’ option will copy the audio four additional times into the timeline so that the total length of the audio matches the length of the video.
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