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Tacotron-2:

Tensorflow implementation of DeepMind's Tacotron-2. A deep neural network architecture described in this paper: Natural TTS synthesis by conditioning Wavenet on MEL spectogram predictions

Note:

  1. You can check modification at the end of the webpage.
  2. The implementation of tacotron2 with multi-gpus has merged by Rayhane-mamah manually. You can check the commit log to get it.

Repository Structure:

Tacotron-2
├── datasets
├── en_UK		(0)
│   └── by_book
│       └── female
├── en_US		(0)
│   └── by_book
│       ├── female
│       └── male
├── LJSpeech-1.1	(0)
│   └── wavs
├── logs-Tacotron	(2)
│   ├── eval_-dir
│   │ 	├── plots
│ 	│ 	└── wavs
│   ├── mel-spectrograms
│   ├── plots
│   ├── pretrained
│   └── wavs
├── logs-Wavenet	(4)
│   ├── eval-dir
│   │ 	├── plots
│ 	│ 	└── wavs
│   ├── plots
│   ├── pretrained
│   └── wavs
├── papers
├── tacotron
│   ├── models
│   └── utils
├── tacotron_output	(3)
│   ├── eval
│   ├── gta
│   ├── logs-eval
│   │   ├── plots
│   │   └── wavs
│   └── natural
├── wavenet_output	(5)
│   ├── plots
│   └── wavs
├── training_data	(1)
│   ├── audio
│   ├── linear
│	└── mels
└── wavenet_vocoder
	└── models

The previous tree shows the current state of the repository (separate training, one step at a time).

  • Step (0): Get your dataset, here I have set the examples of Ljspeech, en_US and en_UK (from M-AILABS).
  • Step (1): Preprocess your data. This will give you the training_data folder.
  • Step (2): Train your Tacotron model. Yields the logs-Tacotron folder.
  • Step (3): Synthesize/Evaluate the Tacotron model. Gives the tacotron_output folder.
  • Step (4): Train your Wavenet model. Yield the logs-Wavenet folder.
  • Step (5): Synthesize audio using the Wavenet model. Gives the wavenet_output folder.

Note:

  • Our preprocessing only supports Ljspeech and Ljspeech-like datasets (M-AILABS speech data)! If running on datasets stored differently, you will probably need to make your own preprocessing script.
  • In the previous tree, files were not represented and max depth was set to 3 for simplicity.
  • If you run training of both models at the same time, repository structure will be different.

Model Architecture:

The model described by the authors can be divided in two parts:

  • Spectrogram prediction network
  • Wavenet vocoder

To have an in-depth exploration of the model architecture, training procedure and preprocessing logic, refer to our wiki

Current state:

To have an overview of our advance on this project, please refer to this discussion

since the two parts of the global model are trained separately, we can start by training the feature prediction model to use his predictions later during the wavenet training.

How to start

first, you need to have python 3 installed along with Tensorflow.

next you can install the requirements. If you are an Anaconda user: (else replace pip with pip3 and python with python3)

pip install -r requirements.txt

Dataset:

We tested the code above on the ljspeech dataset, which has almost 24 hours of labeled single actress voice recording. (further info on the dataset are available in the README file when you download it)

We are also running current tests on the new M-AILABS speech dataset which contains more than 700h of speech (more than 80 Gb of data) for more than 10 languages.

After downloading the dataset, extract the compressed file, and place the folder inside the cloned repository.

Preprocessing

Before running the following steps, please make sure you are inside Tacotron-2 folder

cd Tacotron-2

Preprocessing can then be started using:

python preprocess.py

dataset can be chosen using the --dataset argument. If using M-AILABS dataset, you need to provide the language, voice, reader, merge_books and book arguments for your custom need. Default is Ljspeech.

Example M-AILABS:

python preprocess.py --dataset='M-AILABS' --language='en_US' --voice='female' --reader='mary_ann' --merge_books=False --book='northandsouth'

or if you want to use all books for a single speaker:

python preprocess.py --dataset='M-AILABS' --language='en_US' --voice='female' --reader='mary_ann' --merge_books=True

This should take no longer than a few minutes.

Training:

To train both models sequentially (one after the other):

python train.py --model='Tacotron-2'

or:

python train.py --model='Both'

Feature prediction model can separately be trained using:

python train.py --model='Tacotron'

checkpoints will be made each 250 steps and stored under logs-Tacotron folder.

Naturally, training the wavenet separately is done by:

python train.py --model='WaveNet'

logs will be stored inside logs-Wavenet.

Note:

  • If model argument is not provided, training will default to Tacotron-2 model training. (both models)
  • Please refer to train arguments under train.py for a set of options you can use.

Synthesis

To synthesize audio in an End-to-End (text to audio) manner (both models at work):

python synthesize.py --model='Tacotron-2'

For the spectrogram prediction network (separately), there are three types of mel spectrograms synthesis:

  • Evaluation (synthesis on custom sentences). This is what we'll usually use after having a full end to end model.

python synthesize.py --model='Tacotron' --mode='eval'

  • Natural synthesis (let the model make predictions alone by feeding last decoder output to the next time step).

python synthesize.py --model='Tacotron' --GTA=False

  • Ground Truth Aligned synthesis (DEFAULT: the model is assisted by true labels in a teacher forcing manner). This synthesis method is used when predicting mel spectrograms used to train the wavenet vocoder. (yields better results as stated in the paper)

python synthesize.py --model='Tacotron' --GTA=True

Synthesizing the waveforms conditionned on previously synthesized Mel-spectrograms (separately) can be done with:

python synthesize.py --model='WaveNet'

Note:

  • If model argument is not provided, synthesis will default to Tacotron-2 model synthesis. (End-to-End TTS)
  • Please refer to synthesis arguments under synthesize.py for a set of options you can use.

Pretrained model and Samples:

Pre-trained models and audio samples will be added at a later date. You can however check some primary insights of the model performance (at early stages of training) here.

References and Resources:

Main work

Done

  • Tacotron 2 multi-GPUs training support
  • Fix wavenet bug when doing inference

To do

  • Scope conflict between Tacotron 2 and wavenet
  • wavenet multi-GPUs training support
  • World vocoder