Robotic voice is a common issue when using the Realtime GPT cluster. The recommended fix is to switch to a different OpenAI voice. For example, update your assistant configuration to use the

marin

voice:

json
"voice": {
  "provider": "openai",
  "voiceId": "marin"
}

Try this change and test your assistant again for improved naturalness. (Reference: Vapi [debugging documentation](https://docs.vapi.ai/debugging)) Source: - [Debugging voice agents](https://docs.vapi.ai/debugging)

I have tried marin and cedar, on the platform they sound fine. On phone call they sound robotic

Hey, Please share your call Id so we can investigate it further.