Merge pull request #2 from OpenVoiceOS/tts-blog

Create 2025-06-26-making-synthetic-voices-from-scratch.md

Author: j1nx

_posts/2025-06-26-making-synthetic-voices-from-scratch.md

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+---
+title: "Making Synthetic Voices From Scratch"
+excerpt: "Creating a voice for a text-to-speech system usually requires a real person to spend hours recording audio. That’s expensive, time-consuming, and in many languages or accents, the voices just don’t exist at all"
+date: "2025-06-26T00:00:00.000Z"
+author:
+  name:  JarbasAl
+  picture: "https://avatars.githubusercontent.com/u/33701864"
+coverImage: "https://github.com/OpenVoiceOS/ovos_assets/blob/master/tts.png?raw=true"
+ogImage:
+  url: "https://github.com/OpenVoiceOS/ovos_assets/blob/master/tts.png?raw=true"
+---
+
+## Making Synthetic Voices From Scratch
+
+### What’s the problem?
+
+Creating a voice for a text-to-speech (TTS) system usually requires a real person to spend hours recording audio. That’s expensive, time-consuming, and in many languages or accents, the voices just don’t exist at all, especially for open-source or offline use.
+
+### What did we do?
+
+We developed a technique that allows us to **create synthetic voices completely from scratch**, even if we don’t have recordings from a real person. These voices:
+
+* Work **offline**, even on small devices like a Raspberry Pi,
+* Can speak any language, if there’s a good donor system available,
+* Are fully customizable in sound and tone.
+
+### How does it work?
+
+1. **Start with an existing voice** - We use an existing TTS voice (from any source) to generate lots of fake speech and text pairs.
+
+2. **Transform it into a new voice** - We apply a special voice conversion process to change the sound of the voice to something new, like a different gender, age, or accent.
+
+3. **Train a compact model** - With this synthetic data, we train a new voice model that sounds natural, speaks fluently, and runs entirely offline.
+
+### Why is this special?
+
+* We can create a new voice **without needing anyone to record lines**.
+* The voices don’t rely on cloud services, they work **100% offline**.
+* Each voice can be **customized** to sound unique or to match a character, personality, or accent.
+
+### What about ethics?
+
+We take voice rights seriously.
+
+* If we’re using a real person’s voice, we always get **clear permission**.
+* If no permission is available, we use **public domain recordings** or create **original voices** that don’t copy anyone.
+* Our process actually makes the voice **less recognizable**, which helps protect privacy and avoid impersonation risks.
+
+### Real-world example
+
+We applied this method to **European Portuguese**, a language that had no good offline voice options. In a short time, we built **4 brand-new, high-quality voices**, no recordings needed, and they all run on small local devices.
+
+> 💡 Did we mention OpenVoiceOS now has a huggingface account? find all our TTS voices and more at [huggingface.co/OpenVoiceOS](https://huggingface.co/OpenVoiceOS)
+
+---
+
+### 🧠 In short:
+
+> We’ve found a way to build natural-sounding, offline-ready synthetic voices, **without needing a real speaker**. It’s fast, ethical, and opens the door for more voices in more languages, for everyone.
+
+---
+
+## Help Us Build Voice for Everyone 
+
+If you believe that voice assistants should be open, inclusive, and user-controlled, we invite you to support OVOS: 
+
+- **💸 Donate**: Your contributions help us pay for infrastructure, development, and legal protections. 
+
+- **📣 Contribute Open Data**: Speech models need diverse, high-quality data. If you can share voice samples, transcripts, or datasets under open licenses, let's collaborate. 
+
+- **🌍 Help Translate**: OVOS is global by nature. Translators make our platform accessible to more communities every day. 
+
+We're not building this for profit. We're building it for people. And with your help, we can ensure open voice has a future—transparent, private, and community-owned. 
+
+👉 [Support the project here](https://www.openvoiceos.org/contribution)
+