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 Orchestra skills. Writing for contemporaries and future stars such as Artie Shaw, and Benny Goodman, Miller gained prowess as an arranger by working in a variety of settings. Later, Miller largely improved his arranging and writing skills by studying under music theorist Joseph Schillinger. In February 1937, Miller started an orchestra that briefly made records for Decca. With this group, Miller used an arrangement he wrote for British bandleader Ray Noble's American band in an attempt to form a clarinet-reed sound. This style developed over time, and eventually became known as the "Glenn Miller sound". Frustrated with his agency over playing