The purpose of the research is to theoretically develop methods of characterisation and attribution of the style of arranging a pop-vocal composition. The algorithm of analytical actions in the process of auditory examination of the specifics of the musical language of the arrangement aimed at identifying the genesis of the style profile of a pop-vocal composition is determined. In this regard, the parameters of tempo rhythm and phonism are defined as the basic criteria for recognising the stylistic dominant of the instrumental component of a song genre composition. The research methodology is based on a comprehensive study of the creative specifics of pop-song arrangements using a systematic typological approaches, inductive and structural-functional methods of analysing musical compositions, and also includes a descriptive auditory method and a method of comparative stylistic characterisation of arrangements, carried out on the principle of contrasting comparisons or comparisons based on the similarity of creative methods of instrumentation, form formation, tempo rhythmic, melodic and thematic and harmonic organisation of the musical material of instrumental accompaniments, is a method of identifying the stylistic dominant (genesis) of a song genre work with a particular direction of popular, jazz, folk or academic music. The research resulted in the theoretical development of a methodology for style attribution of arrangements of cover versions of works of popular song genres.