By 1954, vocal ensembles were grabbing an ever-larger share of the African-American record-buying dollars, so United Records wisely entered the doowop market in 1953, and by 1955, they were considered competitive in the flourishing vocal group market. "Chop Chop Boom" (DMK #703) was devoted to groups issued on the subsidiary State label, while this new CD features groups on the United imprint. Features The Moroccos, the Answers, the Sheppard's and the Pastels. Contains 12 never before released tracks and descriptive notes by Bob Pruter, author of "Doowop: The Chicago Scene".