Musicology is the general name of all theoretical disciplines that study music. The general task of musicology is to clarify their essence and laws through various phenomena related to music. For example, the research on the relationship between music and ideology includes music aesthetics, music history, music ethnology, music psychology, music pedagogy and so on. Music acoustics, law, musical instrument science and so on are the subjects that study the material characteristics of music. The study of music form and its composition includes melody, harmony, counterpoint and formalism. There are also performance considerations, such as performance theory and command methods.