It’s difficult for us to imagine the dire significance of Sofia Gubaidulina’s meeting with Dmitri Shostakovich in 1959 in Soviet Russia, where the Kremlin’s disapproval of a piece of music could put its composer in mortal peril. Born in 1931, Gubaidulina was, like Shostakovich, censured by the Kremlin while still in her twenties. Authorities warned her to change her music’s “mistaken path” to conform to government standards…