At the center of my research are Bartók's orchestral works, specifically the presentation of orchestration, instrumental playing techniques, and modes of performance, as well as the interpretation of their development and semantic content. Bartók also expanded the traditional application of instruments with a percussive character, which created significant novel effects and sounds in the case of melodic instruments, creating a distinctive atmosphere in the composer's works. The occurrence of all these in chamber music and orchestral settings is sometimes endowed with semantic content, the interpretation of which helps to shed light on numerous connections between the works, often their similar dramaturgical construction. Bartók applied novel playing techniques not only on wind and string instruments, but the piano and percussion instruments also manifest with varied timbres in his compositions. My main goal is to present all of these and interpret their occurrence, through which we get closer to the composer's compositional concept and the understanding of the works.