Music and Time Annotation << Back To the Memory of N.A. Roslavetz (1881–1944) A. Gosteva Essay is dedicated to the memory of Nikolai Andreyevich Roslavetz – one of the brightest representatives of the Russian avant-garde music early XX century. His innovative sound system organizations by «sintetakkord» in due time became a viable alternative of Schoenberg’s dodekafony and Scriabin’s «panharmony». Deconstructing familiar tone and creating the own version of its replacement, Roslavetz able to express avant-garde radicalism and keep in touch with tradition. In this aspect, the very «building block» of a musical composition – «sintetakkord» – was a model of such a synthesis and a symbol of the creative legacy of the composer. For a long time music Roslavetz pursued and not performed, manuscripts destroyed. Today, 70 years after the composer’s death, the researcher has the opportunity to take a fresh and scientific look at his work. Keywords: russian avant-garde, Roslavetz, XX century, symbolism, «sintetakkord», chord tonality. Contacts: E-mail: anish79@mail.ru Pp. 17-19.