Mms Tts Bul

🚀 Massively Multilingual Speech (MMS): Bulgarian Text-to-Speech

This project offers a Bulgarian (bul) text-to-speech (TTS) model checkpoint. It's part of Facebook's Massively Multilingual Speech initiative, aiming to bring speech technology to a wide range of languages. You can find more details about supported languages and their ISO 639-3 codes in the MMS Language Coverage Overview, and view all MMS-TTS checkpoints on the Hugging Face Hub: facebook/mms-tts.

✨ Features

• Multilingual Support: Part of a project that scales speech technology to over 1000 languages.
• Advanced Model Architecture: Based on the VITS architecture for high - quality speech synthesis.
• Non - deterministic Synthesis: Allows for different speech rhythms from the same input text.

📦 Installation

MMS-TTS is available in the 🤗 Transformers library from version 4.33 onwards. To use this checkpoint, first install the latest version of the library:

pip install --upgrade transformers accelerate

💻 Usage Examples

Basic Usage

from transformers import VitsModel, AutoTokenizer
import torch

model = VitsModel.from_pretrained("facebook/mms-tts-bul")
tokenizer = AutoTokenizer.from_pretrained("facebook/mms-tts-bul")

text = "some example text in the Bulgarian language"
inputs = tokenizer(text, return_tensors="pt")

with torch.no_grad():
    output = model(**inputs).waveform

Saving the Output

import scipy

scipy.io.wavfile.write("techno.wav", rate=model.config.sampling_rate, data=output)

Displaying in Jupyter Notebook / Google Colab

from IPython.display import Audio

Audio(output, rate=model.config.sampling_rate)

📚 Documentation

Model Details

VITS (Variational Inference with adversarial learning for end-to-end Text-to-Speech) is an end-to-end speech synthesis model that predicts a speech waveform conditional on an input text sequence. It is a conditional variational autoencoder (VAE) comprised of a posterior encoder, decoder, and conditional prior.

A set of spectrogram-based acoustic features are predicted by the flow-based module, which is formed of a Transformer-based text encoder and multiple coupling layers. The spectrogram is decoded using a stack of transposed convolutional layers, much in the same style as the HiFi-GAN vocoder. Motivated by the one-to-many nature of the TTS problem, where the same text input can be spoken in multiple ways, the model also includes a stochastic duration predictor, which allows the model to synthesise speech with different rhythms from the same input text.

The model is trained end-to-end with a combination of losses derived from variational lower bound and adversarial training. To improve the expressiveness of the model, normalizing flows are applied to the conditional prior distribution. During inference, the text encodings are up-sampled based on the duration prediction module, and then mapped into the waveform using a cascade of the flow module and HiFi-GAN decoder. Due to the stochastic nature of the duration predictor, the model is non-deterministic, and thus requires a fixed seed to generate the same speech waveform.

For the MMS project, a separate VITS checkpoint is trained on each langauge.

📄 License

The model is licensed as CC-BY-NC 4.0.

🔧 Technical Details

The model is an end-to-end speech synthesis model based on the VITS architecture. It uses a conditional variational autoencoder (VAE) with a posterior encoder, decoder, and conditional prior. The flow-based module predicts spectrogram-based acoustic features, and the spectrogram is decoded using transposed convolutional layers similar to the HiFi-GAN vocoder. A stochastic duration predictor allows for different speech rhythms from the same input text. The model is trained end-to-end with a combination of variational lower bound and adversarial training losses, and normalizing flows are applied to the conditional prior distribution to improve expressiveness.

📚 BibTex citation

This model was developed by Vineel Pratap et al. from Meta AI. If you use the model, consider citing the MMS paper:

@article{pratap2023mms,
    title={Scaling Speech Technology to 1,000+ Languages},
    author={Vineel Pratap and Andros Tjandra and Bowen Shi and Paden Tomasello and Arun Babu and Sayani Kundu and Ali Elkahky and Zhaoheng Ni and Apoorv Vyas and Maryam Fazel-Zarandi and Alexei Baevski and Yossi Adi and Xiaohui Zhang and Wei-Ning Hsu and Alexis Conneau and Michael Auli},
    journal={arXiv},
    year={2023}
}