Watch and listen as the words and music of the American Yiddish theater come to life.

“The Thomashefskys: Music and Memories of a Life in the Yiddish Theater” brings to life the words and music of the American Yiddish theater. The story’s lead characters — Bessie and Boris Thomashefky — are the grandparents of San Francisco Symphony music director Michael Tilson Thomas. Bessie and Boris immigrated to the United States from Eastern Europe in the 1880s, and while still in their teens, they began to play major roles in the development of New York City’s Yiddish theater. For Jewish immigrants who settled on the lower East Side of Manhattan, the Yiddish theater was central to their lives, and provided a stage for the new ideas that were shaping the transition to an American way of life. In “The Thomashefkys,” Tilson Thomas serves as guide through the lives and repertoire of his grandparents. His grandfather died before he was born, but his grandmother lived until he was 17. His close relationship with her is a source of much of the performance material. Performing at the New World Symphony’s spectacular new Frank Gehry-designed home in Miami, Tilson Thomas shares the stage with a 30-piece orchestra and ensemble cast to bring the repertoire and words of Bessie and Boris to life. With time, aspects of klezmer and cantorial sounds became more integrated and more American, as Jewish composers became immersed in their new surroundings, greatly influencing composers like Irving Berlin and George Gershwin.