Autonomous aesthetics believes that the rules and regulations that restrict music do not come from outside music, but are within the music itself. The essence of music can only be understood in the sound structure itself, and can only be grasped from the music itself. The content of music can only be music itself. Music expresses nothing and means nothing but itself. It denies the duality of content and form in music, believing that the two are unified and that sound structure is everything.