years later, in 1920, the first radio broadcast took place. The art of music, previously at the exclusive command of limited groups of connoisseurs, was by means of the phonograph and the radio made accessible to the great public. Thus, a continuous scientific and technological progress made pOSSible the large-scale diffusion of poetry and literature, painting, sculpture and music, emiching the spiritual heritage of an ever increasing number of people. Just as the reproduction of sound has by now almost…
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