Li Gi, Yüo Ben, "The Fundaments of Music" (China, 2000 years ago)

"The sounds arise in the heart of man. The movements are caused by
the external things. Movements influenced by the external things are arranged in the sound. By getting into relationship with each other the sounds are creating modulations. Modulations, which conform with a rule, are called sounds. The combination of sounds for the means of exhilaration and its combination with shield (scraper) and axe (drilling machine), springs
(onion cutter) and tassels (brushes) is called music."

brpobr improvises music in traditional form.