The Third Angle Ensemble is no stranger to the work of Steve Reich. They've been performing pieces written by the now-80-year-old composer frequently, including a jaw-dropping presentation of "Drumming" featuring members of So Percussion. To start off their new season, the group highlights Reich's string quartets with an emphasis on "Different Trains," a three-movement work composed in 1988 and inspired in part by the Holocaust Trains that transported Jews during World War II. The piece combines the chugging drive of strings with stray snippets of recorded dialogue that follow a similarly hypnotic rhythmic pattern. Rounding out the program on these two nights will be performances of Triple Quartet and WTC 9/11, Reich's elegy to the 2001 terrorist attacks in New York. ROBERT HAM