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Your AI assistant can speak with built-in voices or a custom cloned voice. Natural, realistic voices increase customer trust and engagement.

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TTS Provider

Select your Text-to-Speech provider in the assistant settings. Available in Pipeline and Dualplex modes. Available Providers:
  • ElevenLabs - High-quality voices
  • Cartesia - Fast, low-latency synthesis
The TTS Provider dropdown appears after selecting a language.

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Voice Library

Each TTS provider has its own voice library. Select male/female, accent, or language based on your provider.

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Importing Voices from the Provider Library

Beyond the built-in catalog, you can import any public voice from your TTS provider’s own library (ElevenLabs Voice Library or Cartesia Library). Available in Pipeline and Dualplex modes. Steps:
  1. Click “Import voice” next to the voice selector
  2. Pick the provider (ElevenLabs or Cartesia)
  3. Open the provider’s voice library and find a voice you like
  4. Copy the voice link or ID (the ⋮ menu next to the voice)
  5. Paste it in the import field and click Import
Copy voice link in the ElevenLabs Voice Library

ElevenLabs Voice Library — copy the voice link or ID from the ⋮ menu

Copy ID in the Cartesia Voice Library

Cartesia Voice Library — copy the voice ID from the ⋮ menu

You’ll get a notification when the voice is ready — it then appears in the voice picker like any other voice, billed at the same flat per-minute rate. Notes:
  • ElevenLabs voices with a custom price set by their creator cannot be imported.
  • Private or unshared voices cannot be imported — only public library voices.

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Voice Cloning

Clone a voice from an audio sample. Available in Pipeline and Dualplex modes. Clone to Provider:
  • Cartesia - Single audio file, at least 10 seconds, 1 speaker, no background noise
  • ElevenLabs - Samples over 1 minute, 1 speaker, no background noise. Max 5 minutes total. Quality over quantity.
Steps:
  1. Click “Clone voice” next to voice selector
  2. Select provider (Cartesia or ElevenLabs)
  3. Choose the voice language
  4. Enter a name for your voice
  5. Record or upload audio
  6. Wait for processing
  7. Select your new voice from dropdown

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Best Practices

  1. High-Quality Audio: Clearer samples give better results
  2. Steady Delivery: Natural tone, no abrupt changes
  3. No Background Noise: Record in a quiet environment
  4. Legal: Ensure permission to clone voices that aren’t yours
Tip: After selecting or cloning a voice, do a test call to confirm it sounds as expected.