The Norfleet Brothers hail from Alabama, but they're also an important part of Chicago's gospel-music legacy. The brothers began playing in concert and on radio in their native state in 1946 and began to achieve national acclaim after after they moved here in 1948. By 1959 they had their own gospel show on WBEE; they were so popular that the show was eventually expanded from 30 minutes into a mammoth two-hour production. The Norfleets have kept up with the times, but they've never lost their traditional emphasis on group singing and spoken narration. Three Norfleets--Arthur, Joseph, and Junious--carry on the legacy today. This appearance will take them back to their roots: it's an a cappella show, designed to feature their flawless rich harmonic textures and passionate emotionality, and it should be both rousing and deeply affecting. Tonight, 8 PM, Southend Musicworks, 1313 S. Wabash; 939-2848.