The New York University Steinhardt orchestral string ensemble performed Thursday with members of the Eagles (from left) Timothy B. Schmit, Glenn Frey, Don Henley and Joe Walsh. Mr. Frey has been teaching a songwriting class at NYU. (New York University via Associated Press)

The New York University Steinhardt orchestral string ensemble performed Thursday with members of the Eagles (from left) Timothy B. Schmit, Glenn Frey, Don Henley and Joe Walsh. Mr. Frey has been teaching a songwriting class at NYU. (New York University via Associated Press)