While traditional performances may have been on the decline, many Jewish composers who had mainstream success, such as Leonard Bernstein and Aaron Copland, continued to be influenced by the klezmeric idioms heard during their youth (as Gustav Mahler had been). George Gershwin was familiar with klezmer music, and the opening clarinet glissando of Rhapsody in Blue suggests this influence, although the composer did not compose klezmer directly. Some clarinet stylings of swing jazz bandleaders Benny Goodman and Artie Shaw can be interpreted as having been derived from klezmer, as can the "freilach swing" playing of other Jewish artists of the period such as trumpeter Ziggy Elman.
