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The hills are alive with the sound of yodelling in Stefan Schwietert’s documentary.

Its core question, “What does Switzerland sound like?”, is probed via three devoted yelpers – the traditionally inclined Noldi Alder and the more experimental Christian Zehnder and Erika Stucky.

Despite their differences, they share a poetic take on their country-song, seeing it as an aesthetic echo chamber in which ideas about art, identity, landscape and history bounce off each other and evolve.

There’s nothing dry about this study in tradition: Schwietert stresses the freedom and spontaneity in avant yelping, qualities his lead trio embrace with palpable passion.

Kevin Harley is a freelance journalist with bylines at Total Film, Radio Times, The List, and others, specializing in film and music coverage. He can most commonly be found writing movie reviews and previews at GamesRadar+.