The article is devoted to the work of the outstanding scientistencyclopedist and philosopher of the Arab-Muslim medieval East Abu Nasr al- arabi, who left a bright mark on the universal human spiritual and cultural heritage. In the aesthetic heritage of al-Farabi, harmony is a criterion for the existence of not only the universe, but it is the basis of poetry and music. Studying and analyzing the musical heritage of al-Farabi, one can note the vast and complex theoretical basis of musical science. A number of Al-Farabi's theoretical concepts of music and musical harmony truly reflect the connection between music and the universe.