This is code for our paper which has been accepted to ICASSP 2022:

"Generalization Ability of MOS Prediction Networks" Erica Cooper, Wen-Chin Huang, Tomoki Toda, Junichi Yamagishi https://arxiv.org/abs/2110.02635

Please cite this preprint if you use this code.

• Fairseq toolkit: https://github.com/pytorch/fairseq Make sure you can import fairseq in Python.
• torch, numpy, scipy, torchaudio
• I have exported my conda environment for this project to environment.yml
• You also need to download a pretrained wav2vec2 model checkpoint. These can be obtained here: https://github.com/pytorch/fairseq/tree/main/examples/wav2vec If you are using the run_inference_for_challenge.py script, one will be downloaded for you automatically. Otherwise, please choose wav2vec_small.pt, w2v_large_lv_fsh_swbd_cv.pt, or xlsr_53_56k.pt.
• You also need to have a MOS dataset. You can find the BVCC dataset of MOS ratings that was used for the VoiceMOS Challenge here: https://zenodo.org/record/6572573#.Yphw5y8RprQ

Run python run_inference.py --datadir /path/to/your/wavdir

The wavdir should contain .wav audio files for which you want to predict MOS.

Note: These .wav files should already be downsampled to 16kHz and sv56-normalized. Please do this by yourself first. The output will be answers.txt which will contain the name of each audio file and its predicted MOS.

CAVEAT EMPTOR: This MOS predictor is experimental technology. It was trained on English-language audio samples from text-to-speech and voice conversion systems from 2008-2020, with their MOS ratings for naturalness. It may not work well on audio from other models, languages, domains, speakers, etc. That being said, we would be really happy to hear about any ways that you are using this pretrained model, and how well it worked for your use case -- please let us know if you have comments or if you publish your results!

Please see instructions in VoiceMOS_baseline_README.md.

This study is supported by JST CREST grants JP- MJCR18A6, JPMJCR20D3, and JPMJCR19A3, and by MEXT KAKENHI grants 21K11951 and 21K19808. Thanks to the organizers of the Blizzard Challenge and Voice Conversion Challenge, and to Zhenhua Ling, Zhihang Xie, and Zhizheng Wu for answering our questions about past challenges. Thanks also to the Fairseq team for making their code and models available.

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Copyright (c) 2021, Yamagishi Laboratory, National Institute of Informatics All rights reserved.

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