He had lots of friends who regularly gave the first performances of his works. Most of his symphonies were first performed by the Leningrad Philharmonic conducted by Eugeny Mravinsky. His string quartets were first performed by the Beethoven String Quartet. The violinist David Oistrakh, the cellist Mstislav Rostropovitch, and the pianist Sviatoslav Richter were all close friends who played his music.