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What is Realtime TTS-2?

Inworld AI's Realtime TTS-2 is an advanced voice generation model crafted for real-time conversation, striving to deliver a dialogue experience that closely resembles human interaction. This groundbreaking system captures every facet of a conversation, assessing the user's tone, rhythm, and emotional subtleties, while enabling developers to direct voice output through straightforward English commands, akin to directing an AI. Unlike conventional speech synthesis that functions independently, this model contextualizes previous conversations, ensuring that tone and pacing adapt dynamically, meaning that a response can evoke varied reactions based on prior context, such as humor or melancholy. Moreover, the Voice Direction feature allows developers to influence speech delivery in a way similar to a director guiding an actor, utilizing natural language instead of fixed emotion settings or sliders. Developers can also include inline nonverbal indicators like [sigh], [breathe], and [laugh] directly in the text, which the model effortlessly converts into appropriate audio responses. Importantly, Realtime TTS-2 preserves a cohesive voice identity across more than 100 languages, facilitating seamless language shifts within a single interaction, which significantly boosts its utility in various multilingual environments. As a result, this capability not only enhances the authenticity of conversations but also plays a crucial role in narrowing the divide between human communicative nuances and machine responses. The advancements of Realtime TTS-2 make it a remarkable tool in the evolution of interactive voice technology.

What is Inworld TTS?

Inworld TTS emerges as a state-of-the-art text-to-speech technology that delivers remarkably lifelike and context-sensitive speech synthesis, complete with sophisticated voice-cloning capabilities, all at a highly competitive price point. Its flagship model, TTS-1, is designed for real-time applications, featuring low-latency streaming that provides the initial audio output in approximately 200 milliseconds and encompasses a broad spectrum of languages, including English, Spanish, French, Korean, and Chinese, among others. Developers can choose between instant zero-shot voice cloning, which requires merely 5 to 15 seconds of audio input, or more comprehensive fine-tuned cloning, which allows for the incorporation of voice-tags to express emotion, style, and non-verbal signals, while also facilitating seamless language transitions without compromising the distinct voice identity. Additionally, for users desiring enhanced expressiveness and multilingual support, the TTS-1-Max model is currently available in preview, showcasing improved functionalities. The platform supports multiple access methods, such as APIs and portal options, and can function in streaming or batch processing modes, making it adaptable for a wide array of uses, including interactive voice assistants, gaming avatars, and custom audio branding projects. With its innovative features and flexibility, Inworld TTS is set to transform the landscape of synthetic voice interactions and enhance user experiences across various domains. As users continue to explore the possibilities, the technology promises to pave the way for more engaging and personalized audio experiences.

Media

Media

Integrations Supported

Claude
ChatGPT
Fireworks AI
Gemini
Google AI Overviews
Grok
Groq
Inworld
LiveKit
Mistral AI
OpenAI
Perplexity
Tenstorrent DevCloud
Vapi AI
gpt-oss-20b

Integrations Supported

Claude
ChatGPT
Fireworks AI
Gemini
Google AI Overviews
Grok
Groq
Inworld
LiveKit
Mistral AI
OpenAI
Perplexity
Tenstorrent DevCloud
Vapi AI
gpt-oss-20b

API Availability

Has API

API Availability

Has API

Pricing Information

$25 per month
Free Trial Offered?
Free Version

Pricing Information

$0.005 per minute
Free Trial Offered?
Free Version

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Inworld

Date Founded

2021

Company Location

United States

Company Website

inworld.ai/blog/realtime-tts-2

Company Facts

Organization Name

Inworld

Date Founded

2021

Company Location

United States

Company Website

inworld.ai/tts

Categories and Features

Text to Speech

API
Adjust Speaking Rate / Pitch
Audio Optimization
Custom Lexicons
Different Voice Choices
Multi-Language Support
Synchronize Speech

Categories and Features

Text to Speech

API
Adjust Speaking Rate / Pitch
Audio Optimization
Custom Lexicons
Different Voice Choices
Multi-Language Support
Synchronize Speech

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