Lang-Worth was the record label for Langlois & Wentworth, Inc., an American company founded in 1933 that recorded radio shows for broadcast. The label provided high-fidelity music to radio stations on a subscription basis, never releasing their music for purchase by the public. This service filled the gap during the musicians strike against the major record companies between 1942 - 1944. Lang-Worth continued to do business for a number of years after WWII and expanded their product offerings to retailers, department stores, garages and so on for use in local radio jingles and cinema adverts. Many post-war records were pressed on a distinctive semi-clear blue vinyl.
Lang-Worth co-founder Cyril Ouelette Langlois, Sr. (November 13, 1893 - June 18, 1957) founded Langlois Filmusic, Inc., one of the first American music libraries, in 1949 with Jack Shaindlin and Robert McBride. In 1965, Shaindlin, one of the company’s founders, bought the rights to the library and created Cinemusic Inc., which became the new owner of Langlois Filmusic. In the 1980's, Cinemusic was purchased by EMI.