(Photo credit: Keith Saunders) Puccini famously left the score of “Turandot” incomplete at his death in 1924, and its last minutes have been completed by other composers such as Franco Alfano (1926) and most recently Luciano Berio (2002). Arturo Toscanini conducting the premiere a century ago simply put down his baton at the point where Puccini had stopped composing and {…}