M4Singer: A Multi-Style, Multi-Singer and Musical Score Provided Mandarin Singing Corpus - Zhang, Lichao; Li, Ruiqi; Wang, Shoutong; Deng, Liqun; Liu, Jinglin; Ren, Yi; He, Jinzheng; Huang, Rongjie; Zhu, Jieming; Chen, Xiao; Zhao, Zhou (Advances in Neural Information Processing Systems, 2022)