Alright, here are a few recommendations for fantasy novels where the main character uses musical instruments: [1]"Battle Through the Heavens"-Tian Can Tu Dou: This novel narrates the growth of a youth called Xiao Yan. During the process of training, he learned a series of powerful skills, including playing musical instruments. 2 " The Qin Emperor "-Xiao Ding: This novel tells the story of a woman named Qin Ling. She controls the world by playing the zither and becomes a legendary Qin Emperor. [3]" Lord Snow Eagle "-Outsider: This novel tells the story of a young man named Zhang Yide. In the process of becoming a powerful lord, he learned to play the guitar and thus became a musical genius. 4 " Full Time Expert "-Butterfly Blue: This novel tells the growth of a game expert. He learned to play the piano in the game and became a music master. I hope these recommendations will be helpful to you!