🎤 Piper TTS MCP Server

A Model Context Protocol (MCP) server that integrates Piper TTS for high-quality text-to-speech functionality. This server provides a speak tool that converts text to speech and plays it directly through your speakers with customizable volume control.

✨ Features

• 🔊 High-quality text-to-speech using Piper TTS
• 🎚️ Volume control (0.01 to 1.00)
• ⚡ Memory-based audio playback (no temporary files)
• 🔧 Customizable voice parameters (speaker, speed, voice variation)
• 🚀 Fast and lightweight MCP integration
• 🔇 Silent operation (no console output)

📋 Requirements

⚠️ Important Prerequisites:

• Python 3.12+ installed on your system
• Piper TTS service running on localhost:5000

You can set this up using the included Docker configuration or by running Piper TTS separately.

🚀 Quick Start

1. 🐳 Start Piper TTS Service

Clone this repo and start the TTS service:

git clone https://github.com/CryptoDappDev/piper-tts-mcp.git
cd piper-tts-mcp

Option A: Using Docker Compose (Recommended)

docker compose up -d

Option B: Using Docker Build

docker build -t piper-tts-mcp .
docker run -p 5000:5000 piper-tts-mcp

2. 🔧 Configure MCP Client

Add the server to your MCP configuration (e.g., .mcp.json for Claude Desktop):

{
  "mcpServers": {
    "speak": {
      "command": "uv",
      "args": [
        "--directory",
        "/path/to/your/piper-tts-mcp",
        "run",
        "server.py"
      ]
    }
  }
}

3. 🎉 Enjoy!

The speak tool is now available in your MCP client!

🛠️ Usage

The MCP server provides a speak tool with the following parameters:

Example Usage

# Basic usage
speak("Hello, world!")

# With custom volume
speak("This is louder!", volume=0.5)

# With custom voice settings
speak("Fast and varied speech", 
      length_scale=0.8, 
      volume=0.3, 
      noise_scale=0.8)

🔧 Development

Dependencies

• Python 3.12+
• mcp[cli] - MCP framework
• requests - HTTP client for TTS API
• pygame - Audio playback

Local Development

# Install dependencies
uv sync

# Run the server
uv run server.py

📦 Docker Configuration

The included Docker setup provides:

• Piper TTS service on port 5000
• Pre-configured voice models
• Automatic startup

🎙️ Voice Models

The default voice model used in this repository is en_GB-cori-high (British English, female voice).

🔍 Exploring Voice Options

• Voice Samples: Listen to different voice models at Piper Voice Samples
• Piper Documentation: Learn more about Piper TTS at rhasspy/piper

🛠️ Changing Voice Models

To use a different voice model:

1. Choose a voice from the voice samples page
2. Update the Dockerfile - Replace en_GB-cori-high with your chosen voice model:

   # Download your preferred voice model
   RUN python3 -m piper.download_voices your-chosen-voice-model
   
   # Update the server command
   CMD ["sh", "-c", "python3 -m piper.http_server -m your-chosen-voice-model"]
   

3. Rebuild the Docker image:

   docker build -t piper-tts-mcp .
   docker compose up -d
   

🎨 Creating Custom Voices

Creating your own custom voice requires additional effort and research. Please refer to the Piper documentation for guidance on voice training and customization.

🤝 Contributing

Contributions are welcome! Please feel free to submit issues and pull requests.

📄 License

This project is open source and available under the MIT License.

🙏 Acknowledgments

• Piper TTS - Fast, local neural text to speech
• Model Context Protocol - Standardized protocol for AI model interactions

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