NVIDIA ACE plugins for Unreal

Best for Local lip sync, speech and NPC dialogue in Unreal

Can you ship it?

Depends, see note Plugins MIT; each model has its own licence (Audio2Face weights allow commercial use) Source

Price

Free (plugins MIT; models under their own licences)

Works with

Unreal 5.5 to 5.7 (Audio2Face plugin 5.4 to 5.6); local Audio2Face on Windows with an NVIDIA RTX 30-series or newer GPU

NVIDIA's free set of Unreal Engine 5 plugins for AI characters: Audio2Face-3D turns voice audio into facial animation for MetaHumans, and separate ASR, TTS and LLM plugins add speech recognition, ready-made voices and dialogue with function calling. NVIDIA builds them as local, RTX-optimized workflows. Check versions before you commit: the Audio2Face plugin stops at Unreal 5.6 and is a release candidate, the LLM plugin is at version 0.5, and ASR, TTS and LLM cover 5.5 to 5.7. Running Audio2Face locally needs an NVIDIA RTX 30-series or newer GPU on Windows. The plugins are MIT, but each model has its own licence: the Audio2Face weights allow commercial use, and the Audio2Emotion model may only be used as part of Audio2Face.