VAE Tacotron-2:

Unofficial Implementation of Learning latent representations for style control and transfer in end-to-end speech synthesis

Repository Structure:

Tacotron-2
├── datasets
├── LJSpeech-1.1	(0)
│   └── wavs
├── logs-Tacotron	(2)
│   ├── mel-spectrograms
│   ├── plots
│   ├── pretrained
│   └── wavs
├── papers
├── tacotron
│   ├── models
│   └── utils
├── tacotron_output	(3)
│   ├── eval
│   ├── gta
│   ├── logs-eval
│   │   ├── plots
│   │   └── wavs
│   └── natural
└── training_data	(1)
    ├── audio
    └── mels

The previous tree shows what the current state of the repository.

• Step (0): Get your dataset, here I have set the examples of Ljspeech.
• 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.

Requirements

first, you need to have python 3.5 installed along with Tensorflow v1.6.

next you can install the requirements :

pip install -r requirements.txt

else:

pip3 install -r requirements.txt

Dataset:

This repo tested on the ljspeech dataset, which has almost 24 hours of labeled single actress voice recording.

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

or

python3 preprocess.py

dataset can be chosen using the --dataset argument. Default is Ljspeech.

Training:

Feature prediction model can be trained using:

python train.py --model='Tacotron'

or

python3 train.py --model='Tacotron'

Synthesis

There are three types of mel spectrograms synthesis for the Spectrogram prediction network (Tacotron):

• 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' --reference_audio='ref_1.wav'

or

python3 synthesize.py --model='Tacotron' --mode='eval' --reference_audio='ref_1.wav'

Note:

• This implementation not completly tested for all scenarios but training and synthesis with reference audio working.
• Though it only tested on synthesize without GTA and with eval mode.
• After training 250k step with 32 batch size on LJSpeech, KL error settled down near to zero (around 0.001) still not get good style transfer and control, may be because this model trained on LJSpeech which is not quite expressive datasets and only have 24 hrs of data, it might be produce good result on expressive dataset like Blizzard 2013 voice dataset though author of the paper used 105 hrs of Blizzard Challenge 2013 dataset.
• In my testing, I havn't get good results so far on style transfer side may be some more tweaking required, this implementation easily integrated with wavenet as well as WaveRNN.
• Feel free to suggest some changes or even better raise PR.

Pretrained model and Samples:

TODO Claimed Samples from research paper : http://home.ustc.edu.cn/~zyj008/ICASSP2019

References and Resources:

• Tensorflow original tacotron implementation
• Original tacotron paper
• Attention-Based Models for Speech Recognition
• Natural TTS synthesis by conditioning Wavenet on MEL spectogram predictions
• r9y9/Tacotron-2
• yanggeng1995/vae_tacotron

Work in progress