<P> His first studio recordings were with Oliver for Gennett Records on April 5--6, 1923 . They endured several hours on the train to remote Richmond, Indiana, and the band was paid little . The quality of the performances was affected by lack of rehearsal, crude recording equipment, bad acoustics, and a cramped studio . In addition, Richmond was associated with the Ku Klux Klan . </P> <P> Lil Hardin Armstrong urged him to seek more prominent billing and develop his style apart from the influence of Oliver . She encouraged him to play classical music in church concerts to broaden his skills . She prodded him into wearing more stylish attire to offset his girth . Her influence eventually undermined Armstrong's relationship with his mentor, especially concerning his salary and additional money that Oliver held back from Armstrong and other band members . </P> <P> Armstrong and Oliver parted amicably in 1924 . Shortly afterward, Armstrong received an invitation to go to New York City to play with the Fletcher Henderson Orchestra, the top African - American band of the time . He switched to the trumpet to blend in better with the other musicians in his section . His influence on Henderson's tenor sax soloist, Coleman Hawkins, can be judged by listening to the records made by the band during this period . </P> <P> Armstrong adapted to the tightly controlled style of Henderson, playing trumpet and experimenting with the trombone . The other members were affected by Armstrong's emotional style . His act included singing and telling tales of New Orleans characters, especially preachers . The Henderson Orchestra played in prominent venues for patrons only, including the Roseland Ballroom, with arrangements by Don Redman . Duke Ellington's orchestra went to Roseland to catch Armstrong's performances . Young musicians tried to outplay him but split their lips in their attempts . </P>

When did louis armstrong switch from the cornet to the trumpet
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