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phaseaug

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ICASSP 2023 Accepted

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hifi-gan
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phaseaug.py
README.md
requirements.txt
setup.py
train.py

# Installation Guide

1. Get the code

git clone https://github.com/maum-ai/phaseaug

Downloads the entire project code from GitHub to your computer.

cd phaseaug

Moves into the project folder you just downloaded.

2. Official Install Script

Easy Recommended

Prerequisites

Python 3 Python is required to use pip.

pip install alias-free-torch==0.0.6 phaseaug

Installs the package published on PyPI directly — no need to clone the source.

✅ After installing, open a new terminal and run the program's version command (e.g. --version) to confirm it worked.

Pulled directly from this repo's README.

3. Docker

Easy

Prerequisites

Git Needed to download the project code from GitHub.
Docker Desktop Needed to build and run containers. Install it and keep it running in the background.

docker build -t=phaseaug --build-arg USER_ID=$(id -u) --build-arg GROUP_ID=$(id -g) --build-arg USER_NAME=$USER

Builds a runnable image based on the Dockerfile.

✅ Run docker compose ps to check the containers are Up. If the README mentions a port, open http://localhost:PORT in your browser.

Pulled directly from this repo's README.

4. Python

Easy

Prerequisites

Git Needed to download the project code from GitHub.
Python 3 On Windows, be sure to check 'Add Python to PATH' during installation.

pip install alias-free-torch==0.0.6 phaseaug

Installs the package published on PyPI directly — no need to clone the source.

✅ If it runs without errors and prints output in the terminal, it worked.

Pulled directly from this repo's README.

// repository documentation

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# PhaseAug

**PhaseAug: A Differentiable Augmentation for Speech Synthesis to Simulate One-to-Many Mapping**<br>
Junhyeok Lee, Seungu Han, Hyunjae Cho, Wonbin Jung @ [MINDsLab Inc.](https://github.com/maum-ai), SNU, KAIST

[![arXiv](https://img.shields.io/badge/arXiv-2211.04610-brightgreen.svg?style=flat-square)](https://arxiv.org/abs/2211.04610) [![GitHub Repo stars](https://img.shields.io/github/stars/maum-ai/phaseaug?color=yellow&label=PhaseAug&logo=github&style=flat-square)](https://github.com/maum-ai/phaseaug) [![githubio](https://img.shields.io/badge/GitHub.io-Audio_Samples-blue?logo=Github&style=flat-square)](https://maum-ai.github.io/phaseaug/)

**Abstract** : Previous generative adversarial network (GAN)-based neural vocoders are trained to reconstruct the exact ground truth waveform from the paired mel-spectrogram and do not consider the one-to-many relationship of speech synthesis. This conventional training causes overfitting for both the discriminators and the generator, leading to the periodicity artifacts in the generated audio signal. In this work, we present PhaseAug, the first differentiable augmentation for speech synthesis that rotates the phase of each frequency bin to simulate one-to-many mapping. With our proposed method, we outperform baselines without any architecture modification. Code and audio samples will be available at https://github.com/maum-ai/phaseaug.

Accepted to ICASSP 2023

![phasor](https://raw.githubusercontent.com/maum-ai/phaseaug/main/asset/phaseaug_phasor.png)

## TODO
- [x] PyTorch 2.0 is released, need to modify STFT and iSTFT for complex support (solved at `1.0.0`)
- [x] Arxiv updated
- [x] Errata in paper will be fixed. Section 2.5 in paper, transition band half-width 0.06-> 0.012.
- [x] Section 2.5, mention about multiplyinng rotation matrix to "the left side of F(x)" will be added. -> transpose m,k to reduce ambiguity
- [x] Upload PhaseAug to [pypi](https://pypi.org/project/phaseaug/).
- [x] Upload [VITS](https://arxiv.org/abs/2106.06103)+PhaseAug sampels at demo page.
- [x] Refactoring codes for packaging.

## Use PhaseAug
- Install `alias-free-torch==0.0.6` and `phaseaug`
```bash
pip install alias-free-torch==0.0.6 phaseaug 
```
- Insert PhaseAug in your code, check [train.py](./train.py) as a example.
```python
from phaseaug.phaseaug import PhaseAug
...
# define phaseaug
aug = PhaseAug()
...
# discriminator update phase
aug_y, aug_y_g = aug.forward_sync(y, y_g_hat.detach())
y_df_hat_r, y_df_hat_g, _, _ = mpd(aug_y, aug_y_g)
y_ds_hat_r, y_ds_hat_g, _, _ = msd(aug_y, aug_y_g)
...
# generator update phase
aug_y, aug_y_g = aug.forward_sync(y, y_g_hat)
y_df_hat_r, y_df_hat_g, fmap_f_r, fmap_f_g = mpd(aug_y, aug_y_g)
y_ds_hat_r, y_ds_hat_g, fmap_s_r, fmap_s_g = msd(aug_y, aug_y_g)
```

- If you are applying `torch.cuda.amp.autocast` like [VITS](https://github.com/jaywalnut310/vits), you need to wrap PhaseAug with `autocast(enabled=False)` to prevent [ComplexHalf issue](https://github.com/jaywalnut310/vits/issues/15).
```python
from torch.cuda.amp import autocast
...
with autocast(enabled=True)
    # wrapping PhaseAug with autocast(enabled=False)
    with autocast(enabled=False)
        aug_y, aug_y_g = aug.forward_sync(y, y_g_hat)
    # usually net_d parts are inside of autocast(enabled=True)
    y_df_hat_r, y_df_hat_g, fmap_f_r, fmap_f_g = net_d(aug_y, aug_y_g)

```

Authors recommend to read codes from [PITS](https://github.com/anonymous-pits/pits) for complicated application.

## Requirements
- [PyTorch>=1.7.0](https://pytorch.org/) for [alias-free-torch](https://github.com/junjun3518/alias-free-torch)
- Support PyTorch>=2.0.0
- The requirements are highlighted in [requirements.txt](./requirements.txt).
- We also provide docker setup [Dockerfile](./Dockerfile).
```
docker build -t=phaseaug --build-arg USER_ID=$(id -u) --build-arg GROUP_ID=$(id -g) --build-arg USER_NAME=$USER
```
- Cloned [official HiFi-GAN repo](https://github.com/jik876/hifi-gan).
- Downloaded [LJ Speech Dataset](https://keithito.com/LJ-Speech-Dataset/).
- (optional) [MelGAN](https://github.com/descriptinc/melgan-neurips) generator

## Training
0. Clone this repository and copy python files to hifi-gan folder
```bash
git clone --recursive https://github.com/maum-ai/phaseaug
cp ./phaseaug/*.py ./phaseaug/hifi-gan/
cd ./phaseaug/hifi-gan
```

- optional: MelGAN generator
  ```bash
  cp ./phaseaug/config_v1_melgan.json ./phaseaug/hifi-gan/
  ```
  - Change generator to MelGAN generator at train.py
  ```python
  # import MelGanGenerator as Generator at [train.py](./train.py)
  #from models import Generator # remove original import Generator
  from models import MelGANGenerator as Generator
  ```

1. Modify dataset path at `train.py`
```python
     parser.add_argument('--input_wavs_dir',
                         default='path/LJSpeech-1.1/wavs_22k')
     parser.add_argument('--input_mels_dir',
                         default='path/LJSpeech-1.1/wavs_22k')
```

2. Run train.py
```
python train.py --config config_v1.json --aug --filter --data_ratio {0.01/0.1/1.} --name phaseaug_hifigan
```
```
python train.py --config config_v1_melgan.json --aug --filter --data_ratio {0.01/0.1/1.} --name phaseaug_melgan
```

## References
This implementation uses code from following repositories:
- [Official HiFi-GAN implementation](https://github.com/jik876/hifi-gan)
- [Official MelGAN implementation](https://github.com/descriptinc/melgan-neurips)
- [Official CARGAN implementation](https://github.com/descriptinc/cargan)
- [alias-free-torch](https://github.com/junjun3518/alias-free-torch)

This README and the webpage for the audio samples are inspired by:
- [LJ Speech Dataset](https://keithito.com/LJ-Speech-Dataset/)
- [Official HiFi-GAN implementation](https://github.com/jik876/hifi-gan)

## Citation & Contact

If this repostory useful for yout research, please consider citing!
```bib
@INPROCEEDINGS{phaseaug,
  author={Lee, Junhyeok and Han, Seungu and Cho, Hyunjae and Jung, Wonbin},
  booktitle={ICASSP 2023 - 2023 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)},
  title={PhaseAug: A Differentiable Augmentation for Speech Synthesis to Simulate One-to-Many Mapping},
  year={2023},
  volume={},
  number={},
  pages={1-5},
  doi={10.1109/ICASSP49357.2023.10096374}
}
```

Bibtex is updated to [ICASSP 2023 version](https://ieeexplore.ieee.org/document/10096374). Please note that page numbers are temporary numbers.

If you have a question or any kind of inquiries, please contact Junhyeok Lee at [jun3518@icloud.com](mailto:jun3518@icloud.com)