ElevenLabs' product only needs minutes of audio of someone speaking to clone their voice.Mensent Photography/Getty ImagesElevenLabs is raising new funding, boosting its valuation to over $3 billion, according to multiple sources. The startup offers tools for creating voice agents that mimic the user's own voice.ElevenLabs is well-funded, but OpenAI's secretive voice project could pose a major threat.ElevenLabs, a startup that can recreate a pers…