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What is Phonon?

Phonon is an open-weight text-to-speech (TTS) model and inference runtime that caters to developers who wish to integrate speech generation into applications with local and offline audio functionalities. This cutting-edge system converts written text into spoken words and can stream speech in real-time as it is generated. It provides interfaces for programming languages such as Rust and Python, includes a Swift package for iOS and macOS, offers JavaScript support for web browsers, and has libraries available for Android; it can also operate as a self-hosted server compatible with OpenAI's API. The model is designed to support various languages, including English, French, German, Spanish, and Portuguese, depending on the specific variant employed. Phonon is ideal for developers looking to embed speech capabilities into mobile, desktop, web, embedded, and server applications, particularly in situations that prioritize offline use or require enhanced privacy. The English model is comprised of 31 million parameters and is licensed under Apache 2.0, while the language-specific and multilingual models, with 40 million parameters, are available under CC BY-NC 4.0. Furthermore, the runtime's source code is offered under either the Apache 2.0 or MIT licenses, ensuring it is accessible for diverse development requirements. This adaptability and extensive support position Phonon as a highly versatile option for speech synthesis across a variety of platforms, making it a valuable asset for developers in the field.

What is Chirp 3?

Google Cloud has introduced Chirp 3 within its Text-to-Speech API, enabling users to create personalized voice models using their own high-quality audio samples. This advancement simplifies the creation of distinctive voices for audio synthesis through the Cloud Text-to-Speech API, making it suitable for both streaming content and extensive text applications. However, due to security measures, this feature is currently available only to a limited group of users, who must contact the sales team to be considered for access. The Instant Custom Voice functionality accommodates various languages, including English (US), Spanish (US), and French (Canada), which broadens its usability. Additionally, this service functions across multiple Google Cloud regions and supports an array of output formats such as LINEAR16, OGG_OPUS, PCM, ALAW, MULAW, and MP3, depending on the selected API method. As advancements in voice technology progress, the potential for tailored audio experiences continues to grow, offering exciting opportunities for innovation in communication and entertainment. This evolution not only enhances creativity but also fosters deeper connections between content creators and their audiences.

Media

No images available

Media

Integrations Supported

Hugging Face

Integrations Supported

Gemini Enterprise Agent Platform
GitHub
Google Cloud Text-to-Speech
Google Colab
Totality

API Availability

Has API

API Availability

Has API

Pricing Information

Pricing not provided
Free Version

Pricing Information

Pricing not provided

Supported Platforms

Android
iPhone
iPad
Windows
Mac
On-Prem
Linux

Supported Platforms

SaaS

Customer Service / Support

Not specified

Customer Service / Support

Standard Support
Web-Based Support

Training Options

Documentation Hub

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Gradium

Date Founded

2025

Company Location

France, United States

Company Website

gradium.ai/phonon

Company Facts

Organization Name

Google

Date Founded

1998

Company Location

United States

Company Website

cloud.google.com/text-to-speech/docs/chirp3-instant-custom-voice

Categories and Features

Categories and Features

AI Models

Not specified

AI Voice Models

Not specified

Text to Speech

Not specified

Voice Cloning

Not specified

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