The song played by Don Camillo during Peppone's public speech is "La Leggenda del Piave", an Italian patriotic song composed during World War One; Don Camillo correctly assumes the simple-minded and emotional Peppone will be swayed by it even if it goes against his communist ideals. Ironically, this ends up boosting Peppone's popularity.
French censorship visa #17361/D.
Italian censorship visa #19632 delivered on 25 August 1955.