The message of peace and love will be celebrated in "The San Francisco Sound," a multi-media musical history tour starting at 8 p.m. on Saturday, July 22 in the beautifully-restored Nourse Theater. Joan Baez, inducted this year into the Rock and Roll Hall of Fame, heads a list of rising young Bay Area singers putting a fresh new sheen on great old songs by Jefferson Airplane, Grateful Dead, Janis Joplin, Jimi Hendrix, Quicksilver Messenger Service, Sly and the Family Stone, Santana and other groundbreaking bands from the psychedelic era.