Jazz Arrangements of Cossack and Lyrical Songs from the Dnieper Region: Features of the Organization and Perception of Musical Time

The study explores various metrorhythmic techniques in contemporary jazz music and their integration into original arrangements of Cossack and lyrical songs from the Dnieper region. It identifies key metrorhythmic methods such as syncopation, polyrhythm, polymeter, and polymetric modulation. These techniques are examined through the lens of their comparison with the organization of time in human daily life and their neurological impact, drawing on both domestic and international research from the late 20th to early 21st centuries. The paper investigates how auditory and attentional mechanisms influence the perception of rhythmic structures in music and the subjective experience of time. The study traces the use of polymetric and polyrhythmic techniques in jazz arrangements and analyzes their role in the re-contextualization of traditional Ukrainian melodies, with attention to the modern audience's reception. It substantiates the author's compositional and arranging methodologies, as well as performance ideas. The phenomenon of "hidden" polyrhythm and polymeter in folk vocal music, resulting from melodic-rhythmic variability, is examined alongside the impact of various metrorhythmic forms on the perception of temporhythmic organization within a composition. Examples of polymetric groupings with varying subdivisions of duration, the application of the polymeter technique, the integration of triadic pairs, and the use of polymetric modulation for transforming rhythmic structures in the author's own arrangements are presented. The significance of metrorhythmic principles in contemporary jazz arrangements of folk music is underscored. The paper concludes by discussing how the diversity of metrorhythmic techniques enriches musical language, broadens the potential of musical time, and enables the creation of complex, intellectually sophisticated constructions that form an integral part of the modern jazz idiom.