Abstract: Certain author song of the 1950s – 1980s are characterized with such structural peculiarity as semantic rhythms. This pattern manifests itself in two forms: dialectical juxtaposition of the particular and the general (PG-rhythm); as well as the conflict of non-entropic and entropic processes, order and chaos (OC-rhythm). For broader understanding of this phenomenon, it is necessary to determine its place within the framework of the author song as a large-scale cultural phenomenon. The author mass processing of popular compositions using the method of almost full enumeration. The research material includes all 5 thematic national collections that feature 487 songs. The analysis of the lyrics reveals the total number of works with the initial semantic rhythmics: 43% with the PG-structure and 23% with the OC-structure. The application of various strategies of analysis indicates that the sampling of no less than 70-80 compositions should be used for achieving accurate results in partial studies (for example, by authors) . In the course of research, the author determines new versions of manifestation of the semantic structures: PG-structure of fable-type, as well as variability of Brodsky's saw in songs with entropic rhythmics. There are also songs with intersection of both types of semantic rhythms. Correlation is established between the social processes of cultural environment associated with the author song and the dynamics of semantic rhythms in popular compositions. In the early 1970s, a bifurcation point is noticed in the moods of the corresponding social community.

Abstract: Cultural phenomena and their correlation with social processes spark specific scientific interest. One of such cultural trends is the author song of the 1950s – 1980s, which became the subject to this research. Adequate interpretation of the content of compositions and their connection with public life requires a particular toolset, especially due to the fact that some texts contain interesting semantic structures. In reading the lyrics, the alternation of fragments with opposite meanings was revealed. Generalization of these meanings to abstract concepts demonstrates that they comprise a semantic rhythm. One of such rhythmic structures consists in rotation of the particular and the universal. This article describes and formalizes the algorithm that resembles the principle of LR (k)-analyzer of context-free grammars, which was used for the analysis of two author songs:  “Ten Stars” by A. Krupp and “Romance of the Old Age” by A. Sukhanov based on the poetry of Omar Khayyám. In the indicated compositions, the author revealed common structures in form of the particular-universal rhythm and the motive of coping, as well as certain structural peculiarities. The songs under review differ in the degree of expression of dialectical contradiction of the “particular” and the “universal”. They also vary in the forms of translation of this semantic rhythm: through non-overlapping sets, additional orthographic dimensions, or storyline expansion on space-time scale.