(Credit: Frances Marshall) The Royal Opera House has announced a cast change for its upcoming production of “Rigoletto.” In the role of Sparafucile, Brindley Sherratt will replace Andrea Mastroni in all September performances. The British bass made his Royal Opera debut in 2001 as in “L’anima del filosofo” and has since performed in the company’s “Die Zauberflöte,” “Eugene Onegin,” “Rigoletto,” {…}