Voices

Every AI Teammate speaks through a Text-to-Speech (TTS) engine that converts the LLM’s text response into natural, expressive audio in real time. TruGen integrates with ElevenLabs and Cartesia to deliver high-quality, human-like voices across a wide range of tones, styles, and languages.

How It Works

When the LLM generates a response, it is passed to the TTS engine which renders it as speech before being streamed back to the user through the avatar. The whole process happens in under a second. The voice your agent uses is set via the voice_id field in your agent configuration. Every voice has a unique ID — copy it from the Voice Library and paste it directly into your agent.

Setting a Voice

Set the voice_id when creating or updating an agent via API:

curl --request POST \
  --url https://api.trugen.ai/v1/ext/agent \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: YOUR_API_KEY' \
  --data '{
    "agent_name": "Support Agent",
    "avatars": [
      {
        "config": {
          "llm": {
            "provider": "openai",
            "model": "gpt-4.1-mini"
          },
          "stt": { "provider": "deepgram", "model": "nova-3" },
          "tts": {
            "provider": "elevenlabs",
            "voice_id": "FGY2WhTYpPnrIDTdsKH5"
          }
        },
        "persona_name": "Support Agent",
        "persona_prompt": "You are a helpful support agent."
      }
    ]
  }'

You can also set the voice directly from the Create New Agent form in the Developer Portal without writing any code.

Choosing the Right Voice

Goal	Recommendation
Professional / corporate tone	Chris, Will, Evan
Warm / conversational	Rachel, Laura, Hope
Multilingual coverage	Any voice — ElevenLabs auto-adapts to the detected language
Regional accent	Yatin (South Asian), Omar (Middle Eastern)

What’s Next?

Voice Library

Browse all available voices and copy their IDs.

Providers

See all STT, LLM, and TTS providers available on TruGen.

Best Practices Library

Introduction

AI Teammates

Video Generation

How It Works

Setting a Voice

Choosing the Right Voice

What’s Next?

Voice Library

Providers

​How It Works

​Setting a Voice

​Choosing the Right Voice

​What’s Next?

Voice Library

Providers

How It Works

Setting a Voice

Choosing the Right Voice

What’s Next?