Rehearsal The Telephone Hour (1947)

In 1947 a 27minute blackandwhite short subject entitled Rehearsal The Telephone Hour was released to theaters Originating in NBCs Studio 6B at 30 Rockefeller Plaza the film featured in addition to Voorhees and the orchestra operatic bass Ezio Pinza and opera mezzosoprano Blanche Thebom singing arias It simulated a rehearsal of the popular program complete with a commercial announcement and then near the end segued to what was presumably the actual radio broadcast