In early September Boston lost one of its musical lights. After a courageous fight against illness, Charles Ansbacher passed away just short of his 68th birthday. His drive to bring classical music to the widest possible audience found its purest expression in the Landmarks Orchestra of Boston, which he founded in 2001. Upon his passing, the Landmarks Orchestra performed a memorial concert on Wednesday, Oct. 6, at Sanders Theatre in Cambridge, conducted by Joan Landry. The program included music by Copland, Dvorak, Bernstein, and others in performances that featured violinist Mariana Green-Hill, pianist Ya-Fei Chuang, and bass Robert Honeysucker. For full details on the program, visit the Landmarks Orchestra, and to hear the concert, tune in at 6:30pm on Wednesday, Nov. 10 for a special broadcast of In Performance with Cathy Fuller.