many other shorts did not warrant. These shorts marked the departure of Jackie Condon, who had been with the group from the beginning of the series. 1928–1931: Entering the sound era Starting in 1928, Our Gang comedies were distributed with phonographic discs that contained synchronized music-and-sound-effect tracks for the shorts. In spring 1929, the Roach sound stages were converted for sound recording, and Our Gang made its "all-talking" debut in April 1929 with the 25-minute film Small Talk. It took a year for McGowan and the gang to fully adjust to talking pictures, during which time they lost Joe Cobb, Jean Darling and Harry Spear and added Norman Chaney, Dorothy DeBorba, Matthew "Stymie" Beard, Donald Haines and Jackie Cooper. Cooper proved to be the personality the series had been missing since Mickey Daniels left and was featured prominently in three 1930/1931 Our Gang films: Teacher's Pet, School's Out, and Love Business. These three shorts explored Jackie Cooper's crush on the new schoolteacher Miss Crabtree, played by June Marlowe. Cooper soon won the lead role in Paramount's feature film Skippy, and Roach sold his contract to MGM in 1931. Other Our Gang members appearing in the early sound shorts included Buddy McDonald, Clifton Young, and Shirley Jean Rickert. Many also appeared in a group cameo appearance in the all-star comedy short The Stolen Jools (1931). Beginning with the short When the Wind Blows, in 1930 background music scores were added to the soundtracks of most of the Our Gang films. Initially, the music consisted of orchestral versions of then-popular tunes. Marvin Hatley had served as the music director of Hal Roach Studios since 1929, and RCA employee Leroy Shield joined the company as a part-time musical director in mid-1930. Hatley and Shield's jazz-influenced scores, first featured in Our Gang with 1930s Pups is Pups, became recognizable trademarks of Our Gang, Laurel and Hardy, and the other Roach series and films. Another 1930 short, Teacher's Pet, marked the first use of the Our Gang theme song, "Good Old Days", composed by Shield and featuring a notable saxophone solo. Shield and Hatley's scores supported Our Gang's on-screen action regularly through 1934, after which series entries with background scores became less frequent. In 1930, Roach began production on The Boy Friends, a short-subject series which was essentially a teenaged version of Our Gang. Featuring Our Gang alumni Mickey Daniels and Mary Kornman among its