Audio Forge (TTS in your own voice)

This project provides a local Text-to-Speech (TTS) service that can clone a voice from an audio sample and then generate speech in that same voice. It is designed to be a self-contained service that you can run locally.

Try it out for free

You can try out the neutts-air model live on Hugging Face Spaces

How it Works

The service uses the NeuTTS-Air model for voice cloning and speech synthesis. When the service starts, it pre-loads and caches voice references from the audio samples provided in the app/samples directory.

The core logic is exposed via a FastAPI server, which provides API endpoints to generate speech from text using one of the pre-cached voices. The entire application is containerized using Docker for easy setup and deployment.

Features

• Voice Cloning: Clone any voice by providing a high-quality audio sample.
• Text-to-Speech: Generate natural-sounding speech from text in the cloned voice.
• FastAPI Service: Exposes the TTS functionality through a simple and clean REST API.
• Dockerized: Easy to run and deploy using Docker.
• Pre-cached Voices: Comes with pre-cached male and female voices for immediate use.

Tech Stack

• Model: NeuTTS-Air
• Framework: FastAPI
• Audio Processing: librosa, soundfile
• Phonemization: phonemizer
• Containerization: Docker

Setup Instructions

Note

Performance Considerations : For optimal performance, it is recommended to run this service in a Linux environment where Docker is installed natively. When running on Windows or macOS via Docker Desktop, the service may experience significantly slower performance due to the overhead of the underlying virtual machine.

1. Download the Models

Before building the Docker image, you need to download the pre-trained models. The save_models.py script will download and save the necessary model files into the app/neuttsair/local_models directory.

Navigate to the app/neuttsair directory and run the script:

cd app/neuttsair
python save_models.py

2. Build the Docker Image

Once the models are downloaded, you can build the Docker image. Navigate back to the root of the project and run the following command:

docker build -t tts-service .

This will build a Docker image with the tag tts-service.

3. Run the Docker Container

After the image is built, you can run it as a container. The following command will start the container and map the service's port (8000) to the same port on your host machine.

docker run -p 8000:8000 tts-service

The TTS service will now be running and accessible at http://localhost:8000.

Using Your Own Voice

You can configure the service to use your own voice by following these steps:

Step 1: Record Your Voice Sample

Record a sample of your voice, keeping the following guidelines in mind for the best results:

• Format: Mono channel, 16-44 kHz sample rate, saved as a .wav file.
• Length: Between 3 and 15 seconds.
• Quality: The audio should be clean, with minimal to no background noise.
• Content: Use natural, continuous speech, like a monologue or conversation with few pauses. This helps the model capture the tone of your voice effectively.

Step 2: Add the Audio and Transcript

1. Place your recorded .wav file in the app/samples directory. For example, name it my_voice.wav.
2. Create a text file (.txt) containing the exact transcript of your recording. The name of the text file should match the name of your .wav file. For example, if your audio file is my_voice.wav, the transcript file should be my_voice.txt.
3. Place the transcript file in the same app/samples directory.

Step 3: Use Your Voice in an API Call

The service will automatically detect and load new voices from the samples directory.

To use your voice, simply make an API call and set the voice_type parameter to the name of your audio file (without the .wav extension).

For example, if you added my_voice.wav and my_voice.txt to the app/samples directory, you would use "my_voice" as the voice_type:

Request Body:

{
  "text": "This is a test of my own voice.",
  "voice_type": "my_voice"
}

The service will find your audio sample, encode it, cache it for future requests, and use it to generate the speech.

API Endpoints

The service exposes the following endpoints:

1. Generate TTS (Base64)

• Endpoint: POST /generate-tts-base64/
• Description: Accepts text and a voice type, and returns the synthesized audio as a Base64 encoded WAV string. This is useful for applications that need to handle the audio data directly without saving it to a file.
• Request Body:

  {
    "text": "Hello, world. This is a test.",
    "voice_type": "MALE"
  }

  • text (string, required): The text to be converted to speech. Must be between 3 and 500 characters.
  • voice_type (string, required): The voice to use for the synthesis. Can be either "MALE" or "FEMALE".
• Response Body:

  {
    "audio_base64": "UklGRiQAAABXQVZFZm10IBAAAAABAAEARKwAAIhYAQACABAAAABkYXRhIAAAAA...",
    "input_text": "Hello, world. This is a test.",
    "voice_type": "MALE"
  }

  • audio_base64 (string): The Base64 encoded WAV audio data.
  • input_text (string): The input text that was synthesized.
  • voice_type (string): The voice type used for the synthesis.

2. Generate TTS (File)

• Endpoint: POST /generate-tts-file/
• Description: Accepts text and a voice type, and returns the synthesized audio as a .wav file. This is useful for directly downloading the audio file.
• Request Body:

  {
    "text": "Hello, world. This is a test.",
    "voice_type": "FEMALE"
  }

  • text (string, required): The text to be converted to speech. Must be between 3 and 500 characters.
  • voice_type (string, required): The voice to use for the synthesis. Can be either "MALE" or "FEMALE".
• Response:
  • The response is a .wav audio file with the Content-Disposition header set to attachment; filename=output.wav.

3. Health

• Endpoint: GET /
• Description: A simple health check endpoint to confirm that the service is running.
• Response:

  {
    "message": "NeuTTS-Air API is running."
  }

Credits

This project uses the open-source neutts-air model from neuphonic. You can find the original repository here: Neutts-Air