FILE -- Charles Hamlen, left, founder of the charity Classical Action: Performing Arts Against AIDS, with Maria Di Dia and Tom Viola of an allied group, Broadway Cares/Equity Fights AIDS, in Times Square in New York, Jan. 5, 1998. Hamlen, who co-founded one of classical music’s leading management agencies, helped build the careers of young stars, including the violinist Joshua Bell, and then left the business to raise money to help people with AIDS, died on Aug. 1, 2018, at his home in Manhattan. He was 75.