Here is the implementation of our paper S2VC: A Framework for Any-to-Any Voice Conversion with Self-Supervised Pretrained Representations.

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Deep LearningS2VC
Overview

S2VC

Here is the implementation of our paper S2VC: A Framework for Any-to-Any Voice Conversion with Self-Supervised Pretrained Representations. In this paper, we proposed S2VC which utilizes Self-Supervised pretrained representation to provide the latent phonetic structure of the utterance from the source speaker and the spectral features of the utterance from the target speaker.

The following is the overall model architecture.

Model architecture

For the audio samples, please refer to our demo page.

Usage

You can download the pretrained model as well as the vocoder following the link under Releases section on the sidebar.

The whole project was developed using Python 3.8, torch 1.7.1, and the pretrained model, as well as the vocoder, were turned to TorchScript, so it's not guaranteed to be backward compatible. You can install the dependencies with

pip install -r requirements.txt

If you encounter any problems while installing fairseq, please refer to pytorch/fairseq for the installation instruction.

Self-Supervised representations

Wav2vec2

In our implementation, we're using Wav2Vec 2.0 Base w/o finetuning which is trained on LibriSpeech. You can download the checkpoint wav2vec_small.pt from pytorch/fairseq.

APC(Autoregressive Predictive Coding), CPC(Contrastive Predictive Coding)

These two representations are extracted using this speech toolkit S3PRL. You can check how to extract various representations from that repo.

Vocoder

The WaveRNN-based neural vocoder is from yistLin/universal-vocoder which is based on the paper, Towards achieving robust universal neural vocoding.

Voice conversion with pretrained models

You can convert an utterance from the source speaker with multiple utterances from the target speaker by preparing a conversion pairs information file in YAML format, like

# pairs_info.yaml
pair1:
    source: VCTK-Corpus/wav48/p225/p225_001.wav
    target:
        - VCTK-Corpus/wav48/p227/p227_001.wav
pair2:
    source: VCTK-Corpus/wav48/p225/p225_001.wav
    target:
        - VCTK-Corpus/wav48/p227/p227_002.wav
        - VCTK-Corpus/wav48/p227/p227_003.wav
        - VCTK-Corpus/wav48/p227/p227_004.wav

And convert multiple pairs at the same time, e.g.

python convert_batch.py \
    -w <WAV2VEC_PATH> \
    -v <VOCODER_PATH> \
    -c <CHECKPOINT_PATH> \
    -s <SOURCE_FEATURE_NAME> \
    -r <REFERENCE_FEATURE_NAME> \
    pairs_info.yaml \
    outputs # the output directory of conversion results

After the conversion, the output directory, outputs, will be containing

pair1.wav
pair1.mel.png
pair1.attn.png
pair2.wav
pair2.mel.png
pair2.attn.png

Train from scratch

Preprocessing

You can preprocess multiple corpora by passing multiple paths. But each path should be the directory that directly contains the speaker directories. And you have to specify the feature you want to extract. Currently, we support apc, cpc, wav2vec2, and timit_posteriorgram. i.e.

python3 preprocess.py
    VCTK-Corpus/wav48 \
    <SECOND_Corpus_PATH> \ # more corpus if you want
    <FEATURE_NAME> \
    <WAV2VEC_PATH> \
    processed/<FEATURE_NAME>  # the output directory of preprocessed features

After preprocessing, the output directory will be containing:

metadata.json
utterance-000x7gsj.tar
utterance-00wq7b0f.tar
utterance-01lpqlnr.tar
...

You may need to preprocess multiple times for different features. i.e.

python3 preprocess.py
    VCTK-Corpus/wav48 apc <WAV2VEC_PATH> processed/apc
python3 preprocess.py
    VCTK-Corpus/wav48 cpc <WAV2VEC_PATH> processed/cpc
    ...

Then merge the metadata of different features.

i.e.

python3 merger.py processed

Training

python train.py processed
    --save_dir ./ckpts \
    -s <SOURCE_FEATURE_NAME> \
    -r <REFERENCE_FEATURE_NAME>

You can further specify --preload for preloading all training data into RAM to boost training speed. If --comment is specified, e.g. --comment CPC-CPC, the training logs will be placed under a newly created directory like, logs/2020-02-02_12:34:56_CPC-CPC, otherwise there won't be any logging. For more details, you can refer to the usage by python train.py -h.

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Comments
  • Cannot find f2114342ff9e813e18a580fa41418aee9925414e in https://github.com/s3prl/s3prl

    Cannot find f2114342ff9e813e18a580fa41418aee9925414e in https://github.com/s3prl/s3prl

    Running convert_batch.py throws ValueError: Cannot find f2114342ff9e813e18a580fa41418aee9925414e in https://github.com/s3prl/s3prl that originates from https://github.com/howard1337/S2VC/blob/8a6dcebc052424c41c62be0b22cb581258c5b4aa/data/feature_extract.py#L18

    File "convert_batch.py", line 61, in main
src_feat_model = FeatureExtractor(src_feat_name, wav2vec_path, device)
File "/deepmind/experiments/howard1337/s2vc/data/feature_extract.py", line 18, in __init__
torch.hub.load("s3prl/s3prl:f2114342ff9e813e18a580fa41418aee9925414e", feature_name, refresh=True).eval().to(device)
File "/storage/usr/conda/envs/s2vc/lib/python3.8/site-packages/torch/hub.py", line 402, in load
repo_or_dir = _get_cache_or_reload(repo_or_dir, force_reload, verbose, skip_validation)
File "/storage/usr/conda/envs/s2vc/lib/python3.8/site-packages/torch/hub.py", line 190, in _get_cache_or_reload
_validate_not_a_forked_repo(repo_owner, repo_name, branch)
File "/storage/usr/conda/envs/s2vc/lib/python3.8/site-packages/torch/hub.py", line 160, in _validate_not_a_forked_repo
raise ValueError(f'Cannot find {branch} in https://github.com/{repo_owner}/{repo_name}. '
ValueError: Cannot find f2114342ff9e813e18a580fa41418aee9925414e in https://github.com/s3prl/s3prl. If it's a commit from a forked repo, please call hub.load() with forked repo directly.

    Any idea on how to solve this?

    opened by jerrymatjila 1
  • Could you provide ppg-extracting code?

    Could you provide ppg-extracting code?

    Dear author,

    In your paper, you mentioned you extracted ppg and SSL features by s3prl toolkit. However, I cannot find in s3prl on how to extract ppg. Could you provide the code or guideline on extracting ppgs? Thanks a lot!
    opened by hongchengzhu 0
  • What are vocoder-ckpt-*.pt?

    What are vocoder-ckpt-*.pt?

    You release the following vocoder checkpoints:

    vocoder-ckpt-apc.pt
vocoder-ckpt-cpc.pt
vocoder-ckpt-wav2vec2.pt

    What are they?

    Are they vocoders fine-tuned on the output of a particular model? I didn't see that described in the paper. Why is this needed, if the S2VC output is a mel? If it's because different models produce different mels, do you use vocoder-ckpt-cpc.pt when target model is cpc? And if so, how did you do the fine-tuning?

    opened by turian 0
  • Training of other features (apc, timit_posteriorgram etc.) do not work

    Training of other features (apc, timit_posteriorgram etc.) do not work

    I have tried training with other than the cpc feature on my prepared corpus. However, the training script fails when the loss function (train.py , line 69). I found that the size of the output vector out is hard-coded, which is inconsistent with the size of the target Mel spectrogram of other features.

    The size of some vectors of the model are:

    • apc case: Input dim: 512, Reference dim: 512, Target dim: 240
    • cpc case: Input dim: 256, Reference dim: 256, Target dim: 80

    I prepared the input feature vectors by using preprocess.py, e.g. python .\preprocess.py (my own corpus) apc .\checkpoints\wav2vec_small.pt processed/apc.

    I have modified the model by changing the size of the vectors and can run train.py now. In the model.py, __init__() of S2VC function, I replace 80 with a function argument and pass the size of Mel vector size. But I cannot determine the modification is appropriate, for I am not familiar with NLP.

    convert_batch.py with pre-trained models works well as you described in README.md.

    Other details of my situation are:

    • Windows 10, PowerShell
    • pytorch 1.7.1 + cu110
    • torchaudio 0.7.1
    • sox 1.4.1
    • tqdm 4.42.0
    • librosa 0.8.1
    opened by sage-git 0
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