Voice actors around the globe are mobilising against the unregulated use of artificial intelligence (AI) to generate and clone human voices that they fear poses a threat to their livelihoods.

"We're fighting a very big monster," said Mario Filio, a Mexican artist who has done voiceovers for Hollywood star Will Smith, the Obi-Wan Kenobi character in Star Wars and the party-loving lemur King Julien in the animated movie "Madagascar".

Campaigning under the slogan "Don't steal our voices", more than 20 voice acting guilds, associations and unions from Europe, the United States and Latin America have created the United Voice Artists coalition.

It represents the faceless voiceover artists and narrators of commercials, movies, audiobooks and video games who fear that their voices will be replaced by machines, or even cloned by artificial intelligence without their consent.

"The undiscriminating and unregulated use of artificial intelligence is a risk that could lead to the extinction of an artistic heritage of creativity and wonder, an asset that machines cannot generate," according to the group, which says its members include the US National Association of Voice Actors (Nava) and Latin America's Organization of United Voices.

"Our voices are our livelihood," Nava vice president Carin Gilfry said in a statement last month. "And if we don't have control over how those voices are used, we can't make a living," she added.

Thanks to machine learning, software can compare a voice sample with millions of existing ones, identifying patterns that generate a clone. "It's fed by voices that we've been providing for years," said Dessiree Hernandez, president of the Mexican Association of Commercial Announcers.

"We're talking about the right to use your voice without your consent," she added.

Platforms offer human sounding text-to-speech services for a fraction of what professionals would charge. One, revoicer.com, says that it does not intend to replace human voiceovers, but to offer a quicker and cheaper alternative. (AFP)