What are the music description methods in classical poetry?

Many, but metaphor and foil are more common! The use of metaphor is to describe abstract and intangible music as tangible and tangible entities, such as Bai Juyi's pipa performance and Han Yu's piano performance. Synaesthesia is a special form of metaphor, and it is a rhetorical device connecting vision, hearing, taste, smell and touch in No.11 Middle School. Setting off is also very common, and it is also reflected in Bai Juyi's Pipa Trip!