Voices

Every agent speaks through a Text-to-Speech (TTS) engine that converts the LLM’s text response into audio in real time. TruGen supports industry-leading voice providers including ElevenLabs, Cartesia, Rime, Fish Audio, and Inworld TTS — delivering ultra-low first-audio latency across a wide range of voices, accents, and styles. The voice is configured per agent via voice_id. Copy an ID from the Voice Library and drop it into your agent config.

Setting a voice

Set voice_id when you create or update an agent. Everything else (provider, model, sample rate, encoding) falls back to platform defaults if omitted.

{
  "agent_name": "Support Agent",
  "avatars": [
    {
      "avatar_key_id": "665a1170",
      "tts": {
        "voice_id": "FGY2WhTYpPnrIDTdsKH5"
      }
    }
  ]
}

You can also change the voice directly from the Create New Agent form in the Developer Portal: no code required.

Full TTS configuration

For advanced use (custom pronunciations, sample rate, pitch, speaking rate, stability), pass a full tts object:

"tts": {
  "provider": "elevenlabs",
  "model_id": "eleven_turbo_v2_5",
  "voice_id": "FGY2WhTYpPnrIDTdsKH5",
  "language": "a",
  "speaking_rate": 1.0,
  "stability": 0.5,
  "similarity_boost": 0.75,
  "sample_rate": 16000,
  "encoding": "pcm_s16le",
  "fallback_voice_id": "am_puck",
  "customPronounciation": [
    { "word": "TRUGEN", "pronounciation": "TRUE GEN" },
    { "word": "SQL",    "pronounciation": "Sequel" }
  ]
}

See the full agent configuration reference for every field.

Choosing a voice

Goal	Recommendation	Provider
Professional, corporate tone	Chris, Will, Evan	ElevenLabs
Warm, conversational tone	Rachel, Laura, Hope	ElevenLabs
Streaming real-time conversations	Brooke, Blake, Katie	Cartesia
Enterprise-grade clarity	Luna, Celeste, Orion	Rime
Expressive & natural speech	Hannah, Adrian, Ethan	Fish Audio
Interactive gaming & NPC personas	Ashley, Diego, Olivia	Inworld TTS
Broad multilingual coverage	ElevenLabs Turbo v2.5 / Cartesia Sonic 3.5	Auto-adaptive

Choosing a TTS provider

Provider	Provider Key	Model	Best for
ElevenLabs	`elevenlabs`	`eleven_turbo_v2_5` (Turbo v2.5)	Low latency and fast multilingual TTS
ElevenLabs	`elevenlabs`	`eleven_turbo_v2` (Turbo 2)	Low latency and fast English TTS
Cartesia	`lk-inference`	`cartesia/sonic-3.5` (Sonic 3.5)	Next-generation real-time streaming TTS
Cartesia	`lk-inference`	`cartesia/sonic-3` (Sonic 3)	Fast, low-latency streaming TTS
Rime	`lk-inference`	`rime/mistv3` (Mist v3)	Low latency and enterprise-grade TTS
Rime	`lk-inference`	`rime/coda` (Coda)	Low latency and enterprise-grade TTS
Fish Audio	`lk-inference`	`fishaudio/s2.1-pro` (S2.1 Pro)	State of the art expressive TTS
Fish Audio	`lk-inference`	`fishaudio/s2-pro` (S2 Pro)	State of the art expressive TTS
Inworld TTS	`lk-inference`	`inworld/inworld-tts-1.5-mini` (Inworld TTS 1.5 Mini)	State of the art character & interactive TTS

Full provider list in Providers.

Custom pronunciations

Product names, acronyms, and industry jargon often get mispronounced. Fix them per-voice by adding entries to customPronounciation:

"customPronounciation": [
  { "word": "TRUGEN",  "pronounciation": "TRUE GEN" },
  { "word": "API",     "pronounciation": "A P I" },
  { "word": "SQL",     "pronounciation": "Sequel" },
  { "word": "GraphQL", "pronounciation": "Graph Q L" }
]

Pronunciations apply to whichever voice is set on the agent. For dictionaries shared across many agents, see pronunciation dictionaries (coming soon).

Fallback voices

If the primary TTS provider fails or is rate-limited, TruGen falls back to a secondary voice automatically. Set fallback_voice_id to a voice from a different provider for resilience:

"tts": {
  "provider": "elevenlabs",
  "voice_id": "FGY2WhTYpPnrIDTdsKH5",
  "fallback_voice_id": "am_puck"
}

Voice cloning

For a fully custom voice (a spokesperson, a specific character, or your CEO), TruGen supports voice cloning through ElevenLabs Professional Voice Cloning. Contact sales@trugen.ai or provide an existing PVC voice ID directly as voice_id.

Introduction

Models

AI Teammates (Avatars)

Text to Video

Setting a voice

Full TTS configuration

Choosing a voice

Choosing a TTS provider

Custom pronunciations

Fallback voices

Voice cloning

What’s next

Voice Library

Multilingual

​Setting a voice

​Full TTS configuration

​Choosing a voice

​Choosing a TTS provider

​Custom pronunciations

​Fallback voices

​Voice cloning

​What’s next

Voice Library

Multilingual

Setting a voice

Full TTS configuration

Choosing a voice

Choosing a TTS provider

Custom pronunciations

Fallback voices

Voice cloning

What’s next