Though the concert title “Reginald Mobley Sings” centered the guest soloist, MOB’s November program, conducted by Nicholas Kraemer, could have served as a survey of the splendors of Baroque music as well as an introduction to the MOB chorus and orchestra itself. Mobley’s solo arias and contribution to the Purcell ode “Welcome to all the Pleasures” were generously complemented by an a cappella anthem, an English dance suite, and the high-spirited Brandenburg Concerto No. 4!