Answer :
The first popular expression of the new avant-garde school of jazz in chicago can be found in the work of composer/pianist Sun Ra
Sun Ra was the first Chicago composer to use this technique in Big Bands, despite his controversial position as a musical scientist. Sun Ra's band became a central part of the early avant-garde jazz movement in Chicago, being one of the first jazz bands to employ electronic instruments (as early as 1956), including electric piano, clavioline, celeste, and synthesizers.
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