He premiered many works of Soviet composers , including Edison Denisov 's Le soleil des Incas ( Sun of the Incas ) ( 1964 ) , as well as giving the Russian premiere of Benjamin Britten 's A Midsummer Night 's Dream and the Western premiere of Dmitri Shostakovich 's Fourth Symphony at the 1962 Edinburgh Festival .
He gave the first performances of many works of Soviet composers , as well as the first Russian performance of Benjamin Britten 's A Midsummer Night 's Dream .