The Crossing A professional chamber choir conducted by Donald Nally, the Crossing performs at 7:30 tonight at the Cleveland Museum of Art. The group is committed to working with creative teams to make and record new, substantial works for choir that explore and expand ways of writing for choir, singing in choir and listening to music for choir. The concert includes the world premiere of Stacy Garrop’s “In a House Besieged.” It'll feature guest organist Scott Dettra. Garrop’s work is the first Robert G. Schneider memorial commission. Schneider taught for more than 30 years as the chair of the Music Department and director of choirs at Shaker Heights High School; he died in 2018. Check the museum website for more info.