WWII film, Nazis vs. the resistance movement SOLVED

I think “The Moon Is Down” may be what I am thinking of. I remembered loudspeakers instead of explosions but many decades have passed so I may be conflating two movies. I still want to see “Uncertain Glory,” but unless that movie changes my mind, I consider the mystery SOLVED.

Thanks so much to teleadm who suggested this title and to @homergreg who seconded it and, of course, to everyone who pitched in to help. Love you guys.