Kysliak B. Bayan in the chamber-ensemble music of Ukrainian composers: historical and stylistic aspect.

The thesis is devoted to the study of specific and universal aspects of the formation and functioning of the bayan in the chamber-ensemble genre in the historical, stylistic, instrumental-organological, musicological and performing aspects. In the course of the historical process of autonomization of musical instrumentalism, a reflection of the ensemble-synthetic principles is revealed in the organologically-constructive and executive-cognitive structure of new instruments orchestral (ensemble) -shaped type - piano and bayan (accordion). The latter is distinguished in ensemble combinations by a variety of articulatory-dynamic flexibility with the ability to influence the intonation of the stationary part of the sound, textured polyphony, timbre variety, which allows it to create a promising ensemble subsystem. The main stages of the development of the instrumental ensemble are periodized with the participation of the accordion in accordance with the structural, organological and performing status of the instrument and its ensemble functions.