Claim: Russell Watson (Reprise, 2003) didn't record any kinds of songs, and the movie, "Napoli Che Canta" (1926) didn't use any kinds of soundtracks.
Evidence: The film was originally made in 1928 as a silent film but delays, including the addition of sound, meant it was not released for two years. 
It consists almost entirely of recorded Neapolitan songs It was shot at the FERT Studios in Turin.