AI Avatar "Speech to Speech" - NPC or Agents in Mixed Reality

AI Avatar "Speech to Speech" - NPC or Agents in Mixed Reality

The Potential of "Speech-to-Speech" Avatars in Mixed Reality on Meta Quest 3

AI NPCs (Non-Player Characters) are virtual characters powered by artificial intelligence that interact with users in digital environments. Unlike AI Agents, which are designed to perform specific tasks or solve complex problems based on given inputs, AI NPCs enhance the interactive experience in Mixed or Augmented Reality contexts. AI NPCs are ideal for providing smooth, engaging interactions with users in real-time, adapting to the context and the needs of the experience without necessarily solving complex practical tasks as an AI Agent would.

In the case of Metagate, which develops Mixed Reality experiences on platforms like Meta Quest 3, the use of AI NPCs allows for unique and personalized experiences. NPCs can interact with users, respond to voice queries, engage in conversations, and provide support across a wide range of scenarios, as we will explore below. The integration of "speech-to-speech" avatars with advanced AI enables the creation of immersive, fluid, and scalable experiences.

Try the chat version of our Metagate Ambassador on GPT HERE.

Applications of "Speech-to-Speech" Avatars in Mixed Reality

1. Virtual Tour Guides

AI NPCs can be used as virtual tour guides in cultural environments, interacting with visitors in real-time, providing detailed descriptions, and answering questions. Their ability to adapt to the context and preferences of the user makes each experience unique and engaging.

  • Example: An avatar guiding visitors through Pompeii, narrating the history of buildings, answering questions about the ruins, and suggesting personalized routes.

2. Gamification Experiences

AI NPCs in gaming can enhance the player's experience, acting as virtual characters that respond to voice commands. They can provide advice, assign missions, or narrate personalized stories based on the user's choices.

  • Example: An avatar guiding the player through a fantasy world, responding to voice commands, and offering tips during the adventure.

3. Virtual Presenters for Events and Fairs

At events and fairs, AI NPCs can be used as virtual presenters. These avatars not only respond to technical questions but also offer dynamic and interactive presentations of products, adapting to the audience's requests.

  • Example: An avatar at an electronics fair showcasing the features of a new device and answering participants' questions.

4. Virtual Trainers for Training

AI NPCs are particularly effective in training and education contexts. They can adapt their responses in real-time based on the learner's needs, making the training more interactive and personalized.

  • Example: An avatar explaining first-aid techniques during a training session, answering questions, and showing visual demonstrations in Mixed Reality.

5. Shopping Guides in Supermarkets and Malls

In retail, AI NPCs can become virtual assistants to guide customers during shopping. The avatars can answer product questions, suggest combinations, and provide helpful advice.

  • Example: An avatar helping customers in a supermarket to find requested products and suggesting recipes based on purchased items.

6. Corporate Assistants

AI NPCs can evolve into assistants in companies and industrial environments, interacting with users in a more intimate and personalized manner, managing daily tasks, and providing support in various areas, from onboarding to training and product presentations.

  • Example: A virtual assistant guiding through the production process in a company.

7. Healthcare Support

AI NPCs can be employed in the healthcare sector, assisting patients in managing their care. Avatars can provide information about treatments, medication reminders, and answers to medical questions.

  • Example: An avatar in a clinic assisting patients with registration and answering common questions about ongoing treatments.

8. Interactive Entertainment and Media

In entertainment, AI NPCs can be interactive characters with whom the audience can speak directly. This opens new opportunities for TV shows, movies, and live performances, where interaction with characters becomes an integral part of the experience.

  • Example: An avatar interacting with viewers during a TV show, answering questions, and providing real-time updates.

9. Customer Service and Technical Support

AI NPC avatars can enhance customer support services by offering immediate answers to frequently asked questions and assisting customers with technical problem-solving.

  • Example: An avatar guiding a customer through troubleshooting a technical issue, providing step-by-step instructions, and suggesting alternative solutions.

10. Educational Experiences in Schools

Avatars can be used to enrich learning in schools, providing detailed explanations of complex topics and answering students' questions.

  • Example: An avatar explaining scientific concepts using interactive 3D models, making learning more visual and engaging.

The Technology Behind Avatars: Customization and Innovation

AI NPC avatars on platforms like Meta Quest 3 leverage advanced technologies to offer increasingly customizable and interactive experiences. Their knowledge can be easily updated through PDF or Excel files, making the update process simple and flexible.

Mood Recognition and Dynamic Animations

These avatars can recognize the mood of the conversation, adjusting their response based on the user's emotions. They can also trigger animations and 3D assets to make the interaction more engaging. For instance, during an explanation, the avatar can display interactive 3D models to better illustrate a concept.

Realistic Voices Available

Additionally, a wide range of realistic voices are available, some free and others premium (such as ElevenLabs), allowing for the creation of avatars that are more natural and adaptable to user needs. This increases the level of immersion and makes the interaction more realistic.

Costs and Accessibility

Finally, the ability to handle up to 500,000 words at a cost of only €1 for the APIs makes this technology particularly accessible, allowing many companies and organizations to adopt AI NPCs for a wide range of applications.

Metagate uses various AI tools that you can explore HERE.


In conclusion, Metagate's AI NPCs, powered by advanced Mixed Reality technology on Meta Quest 3, are revolutionizing virtual interaction across a multitude of sectors, from entertainment to education, from retail to events. Their versatility, combined with affordable costs, opens new possibilities for creating increasingly personalized and interactive experiences.

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By Marco Pizzini 

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