In order to generate an Overdub voice, you must read at least 10 minutes of the exact Overdub Main Training Script, starting from the beginning, and including the Voice ID. If you record yourself reading different source material, submit a YouTube video of a celebrity interview, or do not read the Voice ID, your Overdub training will fail.
Enterprise customers and Overdub
One exception to this is for Enterprise customers, who can submit audio files that are not based on the Main Training Script to train their Overdub voices. For more information on this, please see Enterprise - Overdub.