Using ElevenLabs in Unreal Engine
ElevenLabs is the gold standard for AI-generated voices. Natural intonation, emotional range, dozens of preset voices, and custom voice cloning — all available in Unreal Engine for dynamic character dialogue that sounds like professional voice acting.
What ElevenLabs Offers for Games
- Text-to-Speech — convert LLM-generated dialogue into natural-sounding speech
- Voice cloning — create custom voices from audio samples. Give every NPC a unique, consistent voice.
- Preset voices — dozens of ready-to-use voices across ages, genders, and accents
- Emotional range — voices that convey happiness, sadness, urgency, and calm naturally
- Scribe (STT) — ElevenLabs' speech-to-text for transcribing player speech
- Low latency — streaming audio generation for real-time dialogue delivery
- Multiple languages — voices in English, Spanish, French, German, Japanese, Korean, and more
The AI Voice Pipeline
Combine LLM text generation with ElevenLabs voice synthesis for a complete AI dialogue system:
- Player speaks or types → transcribed via Whisper or Scribe
- Text sent to ChatGPT/Claude/Gemini → AI generates a response
- Response sent to ElevenLabs → natural voice audio returned
- Audio plays in-game → character speaks the AI-generated line
With streaming, all steps overlap — the character starts speaking while the AI is still generating text.
Voice Direction Tips That Matter In-Game
- Assign one voice profile per major character and keep it stable for identity consistency.
- Use short sentence chunks for combat or high-tempo scenes to avoid late playback starts.
- Normalize output loudness before spatialization so dialogue sits well in the mix.
- Maintain a small local cache of recently generated lines to hide transient API latency.
Common Mistakes
- Overlong lines: long paragraphs sound unnatural. Split dialogue into intentional beats.
- No fallback path: always provide subtitle/text fallback if audio generation fails.
- Uniform delivery: vary style prompts by emotional state (calm, urgent, sarcastic).
Integration
GenAI for Unreal integrates ElevenLabs TTS and Scribe alongside all major LLM providers. Chain them in Blueprints or C++ — LLM response flows directly into ElevenLabs for voice synthesis.