This Detroit-based chamber orchestra of string players performs American Dialogues 250, a program highlighted by Rachel McFarlane’s newly commissioned piece American Dialogue and a reimagination of the polytonal “Blues” movement from Ravel’s Violin Sonata no. 2. Also, a new song cycle by Damien Geter with a libretto by Aaron Dworkin featuring acclaimed mezzo-soprano J’Nai Bridges, Stravinsky’s Concerto for Strings in D, and contemporary works by Roberto Sierra and Jessie Montgomery. 4 p.m., Rackham Auditorium. Tickets $32–$54 (students $15–$20) in advance at ums.org, by phone, & (if available) at the door. (734) 764–2538.