Efrem Flaks was the original performer of songs composed by which other Soviet film composer?
Efrem Flaks Efrem Borisovich Flaks (Russian: Ефре́м Бори́сович Флакс ; 15 January [O.S. 2 January] 1909 — 17 December 1982) was a Soviet singer (bass). A holder of the title of Meritorious Artist of the RSFSR since 1960. He graduated from the Leningrad Conservatory (vocal class) in 1936, from 1939 to 1942 and from 1950 to 1970 worked as a soloist at the Leningrad Philharmonia, from 1943 to 1950 at the Leningrad Radio. He was the original performer of numerous songs by composers Vasily Solovyov-Sedoi, Matvey Blanter, Boris Mokrousov, etc.
Oleg Karavaychuk Oleg Nikolayevich Karavaichuk (Russian: Оле́г Никола́евич Каравайчу́к ; 28 December 1927 – 13 June 2016) was a Soviet and Russian composer, author of music for many films and theater performances.