Yes, Soprano is a fully open source model released under a permissive license. You can download the weights and code from GitHub or Hugging Face for free.

It is capable of generating audio at 2000x real time speed. This means it can generate a 10 hour audiobook in roughly 20 seconds on a decent GPU.

No, Soprano is designed for speed, not cloning. It uses a fixed set of weights to produce a clear but standard voice. For cloning, tools like XTTS or Vall E are better suited.

What hardware do I need?

You can run Soprano on almost anything. It requires less than 1GB of video memory (VRAM), so even older laptops or integrated graphics can handle it.

Soprano AI

Ultra-fast, lightweight text-to-speech for everyone.

From Open Source Project (Hosted on GitHub/Hugging Face)

Founder: ekwek1 (Lead Developer)

Audio & Music

Dec 2025

50K+

Free

Pricing Model

Free

Starting Price

$0/Month

About This AI

Soprano is a breakthrough open-source Text-to-Speech (TTS) model designed for extreme speed and efficiency.

Unlike massive commercial models that require heavy cloud infrastructure, Soprano is an ultra-lightweight model (only 80 million parameters) that runs locally on consumer hardware with as little as 1GB of VRAM.

It prioritizes raw performance, capable of generating up to 20 hours of audio in just 10 seconds (approx. 2000x real-time), making it ideal for real-time streaming, local voice assistants, and high-volume audio processing where latency is critical.

Chatbot Conversation Text To Audio Text To Speech

Pricing

Pricing Model

Free

Starting Price

$0/Month

Key Features

Ultra-Lightweight Architecture: Runs efficiently on just 80M parameters and
Hyper-Fast Generation: Achieves speeds up to 2000x real-time, generating long audio files in seconds.
Vocoder-Based Design: Bypasses slow diffusion methods for a cleaner, faster pipeline that streams audio instantly (
Local Privacy: Runs entirely offline on your machine, ensuring no audio data is sent to the cloud.
Neural Audio Codec: Compresses audio into fewer tokens for faster processing without significant quality loss.
Streaming Support: Capable of generating and playing audio chunks immediately for a "conversational" feel.

Pros

Completely free and open-source
Unmatched generation speed.
Runs on low-end hardware (1GB VRAM).
No internet connection required.
Developer-friendly for integration into apps.

Cons

Voice quality is less "emotional" than larger models like ElevenLabs.
Mispronounces numbers/symbols occasionally.
Limited to the specific voices trained (less variety than paid APIs).
Requires technical knowledge (Python/Command Line) to set up locally.

Best for Developers, hobbyists, and researchers who need a free, privacy-focused, and ultra-fast text-to-speech solution for local applications or real-time bots.

FAQs

Is Soprano AI free?
Yes, Soprano is a fully open source model released under a permissive license. You can download the weights and code from GitHub or Hugging Face for free.
How fast is it?
It is capable of generating audio at 2000x real time speed. This means it can generate a 10 hour audiobook in roughly 20 seconds on a decent GPU.
Can it clone voices?
No, Soprano is designed for speed, not cloning. It uses a fixed set of weights to produce a clear but standard voice. For cloning, tools like XTTS or Vall E are better suited.
What hardware do I need?
You can run Soprano on almost anything. It requires less than 1GB of video memory (VRAM), so even older laptops or integrated graphics can handle it.