Glenn Miller be mentored by other professional musicians. In the beginning, he was the main trombone soloist of the band. But when Jack Teagarden joined Pollack's band in 1928, Miller found that his solos were cut drastically. He realized that his future was in arranging and composing. He had a songbook published in Chicago in 1928 entitled "Glenn Miller's 125 Jazz Breaks for Trombone" by the Melrose Brothers. During his time with Pollack, he wrote several arrangements. He wrote his first composition, "Room 1411", with Benny Goodman, and it was released as a 78 by Brunswick Records under the name Benny Goodman's
Glenn Miller discography Evolution of a Band", Glenn Miller, Sony, 1992.] "Sometime" was a pop ballad with lyrics and music composed by Glenn Miller with Chummy MacGregor in 1939 and sung by Ray Eberle according to John Flower. The published musical score, copyrighted on September 27, 1940 lists the composers as Glenn Miller, Chummy MacGregor, and lyricist Mitchell Parish. "Sometime" was performed for radio broadcast and two airchecks have been released of the song. "Sometime" was first performed on March 5, 1939 at the Meadowbrook Ballroom in Cedar Grove, New Jersey. The song was also performed at the Meadowbrook on March 26, April