This project is a Text-to-Speech (TTS) server implemented in Python using Flask. It utilizes StyleTTS2 for high-quality speech synthesis. The server facilitates the generation of speech from text with various voice styles and parameters, and manages a queue for processing TTS requests.

• Streaming generation allows for long-form narration
• Upload your own voice style files
• Voice cache improves generation performance
• No direct dependency on espeak (but it's required to be installed on your system -- see prerequisites)
• CLI client

You need torch and phonemizer installed on your system / environment:

pip install phonemizer

Install the server a

pip install git+https://github.com/lxe/tts-server.git

Run the server:

python -m tts_server.server

You can use --host <host> and --port <port> to specify the server's address and port. --help for more options.

• Method: POST
• URL: /session/new
• Request (Form-data or JSON):
  • voice (file, optional): Upload a voice file.
  • voice (string, optional): Predefined voice name.
• Response (JSON):
  • message: Confirmation message.
  • voice: Voice used in the session.
  • session_id: Generated session ID.

• Method: POST
• URL: /tts
• Request (JSON):
  • sessionId (integer, required): Session identifier.
  • text (string, required): Text to be synthesized.
  • alpha, beta, diffusion_steps, embedding_scale (floats/integers, optional): TTS parameters.
• Response (audio/wav):
  • Binary WAV file.

• Method: GET
• URL: /voices
• Response (JSON):
  • List of available voice keys.

• Custom error responses for various server exceptions.

The server can be interacted with via CURL commands:

curl -X POST -H "Content-Type: application/json" -H "Accept: audio/wav" -d '{
  "sessionId": 12345,
  "text": "Embrace the chaos and let your words dance to the rhythm of imagination!",
  "alpha": 0.2,
  "beta": 0.4,
  "diffusion_steps": 10,
  "embedding_scale": 1.5
}' "http://localhost:5050/tts" | aplay

...or the CLI client...

python -m tts_server.cli "In a fantastical forest, flittering fireflies illuminate the night, casting a mesmerizing dance of light and shadow beneath the ancient, gnarled trees."

You can pass longer text to the cli for long-form narration:

echo "As the fireflies twinkle in harmonious rhythm, their gentle glow reveals the secrets of the woodland. Tiny creatures, hidden from sight by day, emerge to partake in this nocturnal spectacle. Frogs serenade with their melodic croaks, and owls, wise sentinels of the night, exchange hoots that echo through the enchanted forest." | python -m tts_server.cli -

This project utilizes StyleTTS2 for its text-to-speech synthesis capabilities. Special thanks to @yl4579 for creating StyleTTS2 and @fakerybakery for the styletts2-importable for inspiration on tts.py

This project is licensed under the MIT License - see the LICENSE file for details.