What are the opposing views to Confucianism

What are the opposing viewpoints of "The Theory of Sound Without Lament" and Confucianism?

Author Jikang, the end of Wei zither, music theorist, thinker. Has made zither music "long clear" "short clear" "long side" "short side" and so on. Main point: music is the objective existence of sound. Lamentation is the emotion produced after people's spirit is touched, and there is no causal relationship between the two. It advocates music from the feudal political utilitarianism, and Confucianism's "rites and music" of the music idea of opposition.