This article aims to determine a close "polyphonic" connection between lyrics and music in choral music. The subject of this research is the synergism of literary-textual sources and polyphonic form. The object of this research is the consideration of polyphonic works for a cappella chorus by the contemporary Russian composers. Using the synthesis of research methods, which includes musicology, poetics and choral studies, the author reveals the parameters of a musical composition: literary-textual source and musical form. Detailed analysis is conducted (...) on the dialectical interaction of constructive and destructive formants of the architectonics of musical form of polyphonic compositions for chorus. Special attention is given to differentiation of the structure of the literary-textual source and attribution of the polyphonic forms of motet, madrigal, fugue, and fugato. The main conclusion lies in the paradigm of artistic correlations between the literary and musical text as paralinguistic means that are the bearers of heterogeneous information and add additional colors to the content of the composition. Emphasis is placed on the need to explore the problematic associated with the architectonics of modern choral composition, substantiated not only by the general artistic-historical potential of choral culture, but its crucial importance for modern musical art as well. The novelty lies in the analysis of polyphonic forms of a cappella choral works as multimodal texts, synthesizing the scientific achievements of linguistics and musicology. The author’s special contribution consists in examination of the compositions for a cappella chorus of A. Koroleva and Y. Evgrafov that have not previously been the object of special research, and their introduction to modern scientific discourse. (shrink)