violincello

— The Mark Morris Dance Group will unveil two works, “Visitation,” set to Beethoven ’s cello sonata in C, and “Empire Garden,” to Ives’s trio for violin, violincello and piano, at Tanglewood in August. Mr. Morris is also crashing Mostly Mozart with these dances, which feature quite the musical trio: Yo-Yo Ma, Emanuel Ax and Colin Jacobsen.