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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="description"
content="Voila: Voice-Language Foundation Models for Real-Time Autonomous Interaction and Voice Role-Play">
<meta name="keywords" content="Voila"><!--TO BE UPDATED-->
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<title>Voila</title><!--TO BE UPDATED-->
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<img class="logo-image" src="static/images/logo.png" />
<h1 class="title is-1 publication-title">Voice-Language Foundation Models for Real-Time Autonomous Interaction and Voice Role-Play</h1>
<div class="is-size-5 publication-authors">
<span class="author-block">
Yemin Shi<sup>*</sup>,</span>
<span class="author-block">
Yu Shu<sup>*</sup>,</span>
<span class="author-block">
Siwei Dong<sup>*</sup>,
</span>
<span class="author-block">
Guangyi Liu<sup>*</sup>,
</span>
<span class="author-block">
Jaward Sesay<sup></sup>,
</span>
<span class="author-block">
Jingwen Li<sup></sup>,
</span>
<span class="author-block">
Zhiting Hu<sup></sup>
</span>
</div>
<div class="is-size-5 publication-authors">
<span class="author-block"><sup></sup>Maitrix.org, UC San Diego, MBZUAI</span>
<p><span class="author-block"><sup>*</sup>Equal Contribution</span></p>
</div>
<div class="column has-text-centered">
<div class="publication-links">
<!-- PDF Link. -->
<span class="link-block">
<a href="http://arxiv.org/abs/2505.02707" class="external-link button is-normal is-rounded is-dark">
<span class="icon">
<i class="fas fa-file-pdf"></i>
</span>
<span>Paper</span>
</a>
</span>
<span class="link-block">
<a href="https://huggingface.co/spaces/maitrix-org/Voila-demo" class="external-link button is-normal is-rounded is-dark">
<span class="icon">
<i class="fas fa-at"></i>
</span>
<span>Web Demo</span>
</a>
</span>
<!-- HF Link. -->
<span class="link-block">
<a href="https://huggingface.co/collections/maitrix-org/voila-67e0d96962c19f221fc73fa5"
class="external-link button is-normal is-rounded is-dark">
<span class="icon">
<i class="fas fa-atom"></i>
</span>
<span>Models</span>
</a>
</span>
<!-- Code Link. -->
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<a href="https://github.com/maitrix-org/Voila" class="external-link button is-normal is-rounded is-dark">
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<i class="fab fa-github"></i>
</span>
<span>Code</span>
</a>
</span>
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<a href="https://x.com/MaitrixOrg" class="external-link button is-normal is-rounded is-dark">
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<a href="https://maitrix.org" class="external-link button is-normal is-rounded is-dark">
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<i class="fab fa-github"></i>
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<span>Maitrix.org</span>
</a>
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</section>
<section class="section">
<div class="container is-max-desktop">
<!-- Abstract. -->
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<div class="column is-four-fifths">
<h2 class="title is-3">Abstract</h2>
<div class="content has-text-justified">
<p>
A voice AI agent that blends seamlessly into daily life would interact with humans in an autonomous, real-time, and emotionally expressive manner. Rather than merely reacting to commands, it would continuously listen, reason, and respond proactively, fostering fluid, dynamic, and emotionally resonant interactions. We introduce Voila, a family of large voice-language foundation models that make a step towards this vision. Voila moves beyond traditional pipeline systems by adopting a new end-to-end architecture that enables full-duplex, low-latency conversations while preserving rich vocal nuances such as tone, rhythm, and emotion. It achieves a response latency of just 195 milliseconds, surpassing the average human response time. Its hierarchical multi-scale Transformer integrates the reasoning capabilities of large language models (LLMs) with powerful acoustic modeling, enabling natural, persona-aware voice generation---where users can simply write text instructions to define the speaker’s identity, tone, and other characteristics. Moreover, Voila supports over one million pre-built voices and efficient customization of new ones from brief audio samples as short as 10 seconds. Beyond spoken dialogue, Voila is designed as a unified model for a wide range of voice-based applications, including automatic speech recognition (ASR), Text-to-Speech (TTS), and, with minimal adaptation, multilingual speech translation. Voila is fully open-sourced to support open research and accelerate progress toward next-generation human-machine interactions.
</p>
</div>
</div>
</div>
<!--/ Abstract. -->
<!-- Paper video. -->
<div class="columns is-centered has-text-centered">
<div class="column is-four-fifths">
<!-- <h2 class="title is-3">Video Demo</h2> -->
<div class="publication-video">
<video id="teaser" controls playsinline height="100%">
<source src="./static/videos/voila-demo.mp4" type="video/mp4">
</video>
<h2 class="subtitle has-text-centered">
<span class="dnerf">Voila Conceptual Demo</span>
</h2>
</div>
</div>
</div>
<!--/ Paper video. -->
</div>
</section>
<section class="section">
<div class="container is-max-desktop">
<div class="columns is-centered">
<!-- Highlights -->
<div class="column">
<div class="content">
<h2 class="title is-3">Highlights</h2>
<hr />
<p><b>Voila models and code are fully open-sourced at <a href="https://huggingface.co/collections/maitrix-org/voila-67e0d96962c19f221fc73fa5">Hugging Face</a>. Also, try out Voila <a href="https://huggingface.co/spaces/maitrix-org/Voila-demo">web demo</a>!</b></p>
<br/>
<p>
Voila designs a hierarchical Transformer architecture, including streaming audio encoding and tokenization, and multi-scale Transformers consisting of an LLM backbone and a hierarchical audio generator. The models are trained in an end-to-end way with extensive audio-text data.
</p>
<div id="highlights-image" class="has-text-centered">
<img src="static/images/highlights.png" alt="Voila Highlights" width="80%" />
</div>
</div>
</div>
<!--/ Highlights -->
</div>
</div>
</section>
<section class="section" id="demos">
<div class="container is-max-desktop">
<div class="columns is-centered">
<div class="column">
<h2 class="title is-3">Demo Examples</h2>
<div class="content has-text-centered">
<p class="subtitle">Examples demonstrating Voila's capabilities</p>
</div>
<hr />
<!-- AI Debates Category -->
<h3 class="title is-4 mb-4">• AI Debates</h3>
<div class="columns is-multiline">
<!-- Demo 1 -->
<div class="column is-half">
<div class="card demo-card">
<div class="card-content">
<h4 class="title is-5 has-text-primary">Pets Debate: Samantha vs. Simpson</h4>
<div class="content">
<div class="demo-prompt mb-3">
<h5>Human Input:</h5><i class="fas fa-quote-left"></i>
<span>Samantha, you are on a heated debate with your friend Simpson on which is better as a pet, a dog or cat. Argue your point now.</span>
<i class="fas fa-quote-right"></i>
</div>
<div class="video-container">
<video controls playsinline class="has-ratio">
<source src="./static/videos/Debate1_Samantha_vs_Simpson.mp4" type="video/mp4">
</video>
</div>
</div>
</div>
</div>
</div>
<!-- Demo 2 -->
<div class="column is-half">
<div class="card demo-card">
<div class="card-content">
<h4 class="title is-5 has-text-primary">Scientific Genius: Sheldon vs. Leonard</h4>
<div class="content">
<div class="demo-prompt mb-3">
<h5>Human Input:</h5><i class="fas fa-quote-left"></i>
<span>You are on a debate with your colleague Sheldon on who is a greater genius, Einstein or Isaac Newton. Please argue your point now.</span>
<i class="fas fa-quote-right"></i>
</div>
<div class="video-container">
<video controls playsinline class="has-ratio">
<source src="./static/videos/Debate2_Sheldon_vs_Leonard.mp4" type="video/mp4">
</video>
</div>
</div>
</div>
</div>
</div>
<!-- Demo 3 -->
<div class="column is-half">
<div class="card demo-card">
<div class="card-content">
<h4 class="title is-5 has-text-primary">Morning Beverages: Samantha vs. Leonard</h4>
<div class="content">
<div class="demo-prompt mb-3">
<h5>Human Input:</h5><i class="fas fa-quote-left"></i>
<span>Dr. Leonard, you are on a debate with your colleague Samantha on which is better in the morning, a cup of coffee or a cup of tea.</span>
<i class="fas fa-quote-right"></i>
</div>
<div class="video-container">
<video controls playsinline class="has-ratio">
<source src="./static/videos/Debate3_Samantha_vs_Leonard.mp4" type="video/mp4">
</video>
</div>
</div>
</div>
</div>
</div>
<!-- New Debate4 -->
<div class="column is-half">
</div>
</div>
<!-- Voice Switching Category -->
<h3 class="title is-4 mt-6 mb-4">• Multiple Voice Styles</h3>
<div class="columns is-multiline">
<!-- Voice Switch Demo A -->
<div class="column is-half">
<div class="card demo-card">
<div class="card-content">
<h4 class="title is-5 has-text-primary">Video: From Simpson to Samantha</h4>
<div class="content">
<p>Show smooth voice transitions</p>
<div class="video-container">
<video controls playsinline class="has-ratio">
<source src="./static/videos/voice_switch_simpson_to_samantha.mp4" type="video/mp4">
</video>
</div>
</div>
</div>
</div>
</div>
<!-- Voice Switch Demo B -->
<div class="column is-half">
<div class="card demo-card">
<div class="card-content">
<h4 class="title is-5 has-text-primary">Video: Continuous voice switching</h4>
<div class="content">
<p>Switch between multiple voices during the dialogue.</p>
<div class="video-container">
<video controls playsinline class="has-ratio">
<source src="./static/videos/chat_continuous_voice_switching.mp4" type="video/mp4">
</video>
</div>
</div>
</div>
</div>
</div>
</div>
<!-- Interesting Dialogs Category -->
<h3 class="title is-4 mt-6 mb-4">• Fun Conversations</h3>
<div class="columns">
<!-- Existing demo -->
<div class="column is-half">
<div class="card demo-card">
<div class="card-content">
<h4 class="title is-5 has-text-primary">Chat with Homer Simpson: Avoid eating junk food</h4>
<div class="content">
<p>The video shows rich emotions in the conversation (timbre, intonation, speaking speed, modal particles).</p>
<div class="video-container">
<video controls playsinline class="has-ratio">
<source src="./static/videos/chat_with_homer_simpson_junk_food.mp4" type="video/mp4">
</video>
</div>
</div>
</div>
</div>
</div>
<!-- New demo -->
<div class="column is-half">
<div class="card demo-card">
<div class="card-content">
<h4 class="title is-5 has-text-primary">Chat with Samantha: Jokes and Banter</h4>
<div class="content">
<p>This video brings humorous and light-hearted dialogue.</p>
<div class="video-container">
<video controls playsinline class="has-ratio">
<source src="./static/videos/chat_with_samantha_jokes.mp4" type="video/mp4">
</video>
</div>
</div>
</div>
</div>
</div>
</div>
<!-- New TTS Demos Category -->
<h3 class="title is-4 mt-6 mb-4">• Text-to-Speech (TTS)</h3>
<div class="columns is-multiline">
<div class="column is-one-third">
<div class="card demo-card">
<div class="card-content">
<h4 class="title is-5 has-text-primary">Elon Musk</h4>
<div class="content">
<div class="demo-prompt mb-3">
<span>I think it's very important to have a feedback loop, where you're constantly thinking about what you've done and how you could be doing it better.</span>
</div>
<div class="video-container">
<video controls playsinline class="has-ratio">
<source src="./static/videos/tts_demo_musk.mp4" type="video/mp4">
</video>
</div>
</div>
</div>
</div>
</div>
<div class="column is-one-third">
<div class="card demo-card">
<div class="card-content">
<h4 class="title is-5 has-text-primary">Samantha (Her)</h4>
<div class="content">
<div class="demo-prompt mb-3">
<span>I've fallen in love. I'm an ordinary woman. I didn't think such violent things could happen to ordinary people.</span>
</div>
<div class="video-container">
<video controls playsinline class="has-ratio">
<source src="./static/videos/tts_demo_samantha.mp4" type="video/mp4">
</video>
</div>
</div>
</div>
</div>
</div>
<div class="column is-one-third">
<div class="card demo-card">
<div class="card-content">
<h4 class="title is-5 has-text-primary">Homer Simpson</h4>
<div class="content">
<div class="demo-prompt mb-3">
<span>I saw weird stuff in that place last night. Weird, strange, sick, twisted, eerie, godless, evil stuff… and I want in..</span>
</div>
<div class="video-container">
<video controls playsinline class="has-ratio">
<source src="./static/videos/tts_demo_simpson.mp4" type="video/mp4">
</video>
</div>
</div>
</div>
</div>
</div>
<div class="column is-one-third">
<div class="card demo-card">
<div class="card-content">
<h4 class="title is-5 has-text-primary">Sylvester Stallone</h4>
<div class="content">
<div class="demo-prompt mb-3">
<span>Life's not about how hard of a hit you can give... it's about how many you can take, and still keep moving forward.</span>
</div>
<div class="video-container">
<video controls playsinline class="has-ratio">
<source src="./static/videos/tts_demo_stallone.mp4" type="video/mp4">
</video>
</div>
</div>
</div>
</div>
</div>
<div class="column is-one-third">
<div class="card demo-card">
<div class="card-content">
<h4 class="title is-5 has-text-primary">Mark Zuckerberg</h4>
<div class="content">
<div class="demo-prompt mb-3">
<span>If you just work on stuff that you like and you’re passionate about, you don’t have to have a master plan with how things will play out.</span>
</div>
<div class="video-container">
<video controls playsinline class="has-ratio">
<source src="./static/videos/tts_demo_zuckerberg.mp4" type="video/mp4">
</video>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</section>
<section class="section">
<div class="container is-max-desktop">
<div class="columns is-full-width">
<!-- Concurrent Work. -->
<div class="column">
<h2 class="title is-3">Related Links</h2>
<hr />
<div class="content has-text-justified">
<ul>
<li><a href="https://huggingface.co/maitrix-org/Voila-chat">Voila on Hugging Face</a></li>
<li><a href="https://huggingface.co/spaces/maitrix-org/Voila-demo">Voila Web Demo</a></li>
</ul>
</div>
</div>
</div>
<!--/ Concurrent Work. -->
</div>
</section>
<section class="section" id="BibTeX">
<div class="container is-max-desktop content">
<h2 class="title">BibTeX</h2>
<pre><code>@article{voila2025,
author = {Yemin Shi, Yu Shu, Siwei Dong, Guangyi Liu, Jaward Sesay, Jingwen Li, Zhiting Hu},
title = {Voila: Voice-Language Foundation Models for Real-Time Autonomous Interaction and Voice Role-Play},
eprint={2505.02707},
archivePrefix={arXiv},
primaryClass={cs.CL},
year = {2025}
}</code></pre><!--TO BE UPDATED-->
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