The programmes “Interactive Classic Orchestra” and “Rap’em high” were an integral part of “Piazza virtuale” since the first day of broadcasting. In the programmes, the incoming touch-tone signals from the callers’ phones were used to produce music interactively. For this purpose, the tones of the dialing keys were forwarded by computers to synthesizers that imitated instruments. “Rap’em High” was initially launched under the title “Disco Fever,” but was renamed after just one week on the air.

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