Benny Goodman even to use new fingering techniques. He had his old finger calluses removed and started to learn how to play his clarinet again—almost from scratch." Goodman commissioned compositions for clarinet and chamber ensembles or orchestra that have become standard pieces of classical repertoire. He premiered works by composers, such as "Contrasts" by Béla Bartók; "Clarinet Concerto No. 2, Op. 115" by Malcolm Arnold; "Derivations for Clarinet and Band" by Morton Gould; "Sonata for Clarinet and Piano" by Francis Poulenc, and "Clarinet Concerto" by Aaron Copland. "Prelude, Fugue, and Riffs" by Leonard Bernstein was commissioned for Woody Herman's big band, but
Benny Goodman at the Savoy", and "Goody, Goody". Goodman also played three concerts produced by Chicago socialite and jazz aficionado Helen Oakley. These "Rhythm Club" concerts at the Congress Hotel included sets in which Goodman and Krupa sat in with Fletcher Henderson's band, perhaps the first racially integrated big band appearing before a paying audience in the United States. Goodman and Krupa played in a trio with Teddy Wilson on piano. Both combinations were well received, and Wilson remained. In his 1935–1936 radio broadcasts from Chicago, Goodman was introduced as the "Rajah of Rhythm." Slingerland Drum Company had been calling Krupa the