Adobe Captivate: Methods for Attaching Voiceover Audio
The Logical Blog by IconLogic
FEBRUARY 7, 2013
However, I wouldn't use this technique for voiceover audio. As for voiceover audio, I don't recommend that you add it to a project as the background. First, there's a production speed benefit. You can import wav's or mp3's. if you intend to include it.
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