Diffusion-Based Any-to-Any Voice Conversion

Introduction

• This repository is a derivative of the Official implementation of the paper "Diffusion-Based Voice Conversion with Fast Maximum Likelihood Sampling Scheme" Link. It builds upon their work and incorporates additional features and modifications specific to this project.

• The Official Demo Page.

Pre-trained models

• Please check inference.ipynb for the detailed instructions.

• The pre-trained speaker encoder we use is available at https://drive.google.com/file/d/1Y8IO2_OqeT85P1kks9I9eeAq--S65YFb/view?usp=sharing Please put it to /checkpts/spk_encoder/

• The pre-trained universal HiFi-GAN vocoder we use is available at https://drive.google.com/file/d/10khlrM645pTbQ4rc2aNEYPba8RFDBkW-/view?usp=sharing. It is taken from the official HiFi-GAN repository. Please put it to /checkpts/vocoder/

• You have to download voice conversion model trained on LibriTTS from here: https://drive.google.com/file/d/18Xbme0CTVo58p2vOHoTQm8PBGW7oEjAy/view?usp=sharing

• Additionally, we provide voice conversion model trained on VCTK: https://drive.google.com/file/d/12s9RPmwp9suleMkBCVetD8pub7wsDAy4/view?usp=sharing . Please put models to /checkpts/vc/

Build docker environment

• To build image, run:

Docker build -t diffvc .

• To run a container for develop, run:

bash run-container.sh

Training your own model

• To train model on your data, first create a data directory with three folders: "wavs", "mels" and "embeds". Put raw audio files sampled at 22.05kHz to "wavs" directory. The functions for calculating mel-spectrograms and extracting 256-dimensional speaker embeddings with the pre-trained speaker verification network located at checkpts/spk_encoder/ can be found at inference.ipynb notebook (get_mel and get_embed correspondingly). Please put these data to "mels" and "embeds" folders respectively. Note that all the folders in your data directory should have subfolders corresponding to particular speakers and containing data only for corresponding speakers.

• If you want to train the encoder, create "logs_enc" directory and run train_enc.py. Before that, you have to prepare another folder "mels_mode" with mel-spectrograms of the "average voice" (i.e. target mels for the encoder) in the data directory. To obtain them, you have to run Montreal Forced Aligner on the input mels, get .TextGrid files and put them to "textgrids" folder in the data directory. Once you have "mels" and "textgrids" folders, run get_avg_mels.ipynb. python3 -m scenario.train_enc

• Alternatively, you may load the encoder trained on LibriTTS from https://drive.google.com/file/d/1JdoC5hh7k6Nz_oTcumH0nXNEib-GDbSq/view?usp=sharing and put it to "logs_enc" directory.

• Once you have the encoder enc.pt in "logs_enc" directory, create "logs_dec" directory and run train_dec.py to train the diffusion-based decoder. python3 -m scenario.train_dec

• Please check params.py for the most important hyperparameters.

Demo

• To launch gradio demo app, run:

python3 app_gradio.py

Serve model (developing)

1. Convert model from .pt to .onnx

python3 -m export_onnx.export_hifigan

python3 -m export_onnx.export_spk_enc

2. Deploy pipeline using Triton Inference Server: