Complex sentence: His commentaries on WGBH-FM Radio for Boston Symphony broadcasts on Friday afternoons, as well as those at the Sunday Tanglewood Festival in the summertime are informed by his life-long attendance of the orchestra, dating back to conductors Charles Munch and Erich Leinsdorf.
Split into simpler sentences: His commentaries on WGBH-FM Radio for Boston Symphony broadcasts on Friday afternoons. These broadcasts as well as his commentary at the Sunday Tanglewood Festival in the summertime are informed by his life-long attendance of the orchestra, dating back to conductors Charles Munch and Erich Leinsdorf.