Music and Time Annotation << Back About the Reflection of the Composers I.A. Koshcheeva The article presents the process of mastering polyphony in national musical schools. The formation and evolution of a multivoiced textural organization of works in the conditions of a changing historical and artistic situation is revealed. The transformations that have taken place are evaluated from the perspective of constantly updated composer practice, which contributes to their appearance and gives the right to their existence. The genre of the piano Sonata itself is so multifaceted that it opens up a vast field for research, allowing us to perceive the Sonata as a kind of genre-stylistic conglomerate of various versions of its interpretations and compositional decisions. In addition to stating the fact that the variability of the typical sample of the Sonata genre is due to the change of historical styles, it is important to clarify the reasons for the "survival" of the Sonata genre in the conditions of a radical change in aesthetic attitudes, concepts, compositional innovations, composition techniques and renewal of expressive means. Keywords: development of national composing school, ostinate rhythm structures, organ points. Pp. 13-17.