Their voices are their livelihood. Now AI could take it away.

Companies clamor to use Remie Michelle Clarke's voice. An award-winning vocal artist, her smooth, Irish accent backs ads for Mazda and Mastercard and is the sound of Microsoft's search engine, Bing, in Ireland. But in January, her sound engineer told Michelle Clarke he'd found a voice that sounded uncannily like hers someplace unexpected: on Revoicer.com, For a modest monthly fee, Revoicer customers can access hundreds of different voices and, through an artificial intelligence-backed tool, morph them to say anything -- to voice commercials, recite corporate trainings or narrate books. Revoicer advertised "Olivia" with a photo of a gray-haired woman, who appeared to be of Asian descent, and a blurb: "A deep, calm and kind voice. A 38-year-old brunette, Michelle Clarke looked nothing like "Olivia." But when she hit play, she was greeted with the jarring sound of what could only be her own voice: "Hello my dear ones, my name is Olivia," it said. "I have a soft and caring voice."