Vancouver Master Chorale is collaborating with the Southwest Washington Symphony to perform Verdi’s “Requiem.” The 100-voice choir and soloists will join the Longview-based symphony for two concerts: 7 p.m. Oct. 19 at Lower Columbia College’s Rose Theater, 1600 Maple St., Longview, and 3 p.m. Oct. 20 at Skyview Concert Hall, 1300 N.W. 139th St., Vancouver. The Longview performance is free and the Skyview concert is $30 per person. Buy tickets at vancouvermasterchorale.org.