 Prearranged music had a particular commercial appeal, since audiences were familiar with the songs they saw performed live from the recordings they purchased.Furthermore, exposure to musical innovation—and jazz, in all its varieties, was certainly innovative—had never before reached the same breadth of American audience.Given the commercial availability of music—which, in addition to records, was aided by the proliferation of broadcast radio—a platform was thus created that accounted for the popularization of jazz.