♪ >> whitaker: synthesia has also helped entertainers like snoop dogg go forth and multiply. cost a fortune. >> snoop dogg: ♪ j-u-s-t-e-a-t ♪ >> riparbelli: just eat has a subsidiary in australia, which is called menulog. so, what we did with our technology was we switched out the word just eat for menulog. >> snoop dogg: ♪ m-e-n-u-l-o-g did somebody say, menulog? ♪ >> riparbelli: and all of a sudden they had a localized version for the australian market without snoop dogg having to do anything. >> whitaker: so, he makes twice the money, huh? >> riparbelli: yeah. eight minutes of me reading a script on camera for synthesia to create my synthetic talking head, complete with my gestures, head and mouth movements. another company, "descript," used a.i. to create a synthetic version of my voice. >> deepfake bill whitaker: this is bill whitaker's synthetic voice. >> whitaker: with my cadence, tenor and syncopation. >> deepfake bill whitaker: this is the result. the words you're hearing were never spoken by the real bill into a microphone or to a camera. he merely typed the words i