Apply Marxist-Leninist principles to an orchestra, with the workers owning the means of production, and what do you get? This: “Formed in 1922, Persimfans – a Sovietized shorthand for Perviy Simfonichesky Ansambl, or First Symphony Ensemble – sought to embody the avant-garde spirit of the time.” The original group didn’t survive Stalin’s purges, but this week some musicians are trying out the idea again.