ArtsBridge, the educational initiative of the Cobb Energy Centre Foundation, and Clark Atlanta University radio station WCLK’s Jazz in the Classroom, are hosting a master jazz class from 12 noon to 1 p.m Friday, October 19, at Pebblebrook High School, 991 Old Alabama Rd., in Mableton. The class will will about 100 music students and teachers through a “live” sound check and technical details of producing a successful concert.