Go hiking in the Alps around Salzburg these days and you won't be surprised to hear a resounding "Hol-la ra-e ho-e he!"Amid the green pastures and snowy peaks that famously inspired Julie Andrews to launch into song in "The Sound of Music," a new Yodel hiking trail -- the first in the world -- hopes to teach tourists and locals this unique art of singing.
"Hops ho-da re-e-ri," "ho-da ria drai dul-e-jo," "hul-jo-i diri diri": the lyrics have little meaning but the tunes, alternating constantly between head voice and chest voice -- a little like a Tarzan cry -- take some getting used to.
Dotted around the landscape at an altitude of 2,000 metres (6,560 feet), five trail stops now offer guidance with audio recordings, sheet music and props, including a gigantic cow bell, an echo wall and two cones acting as voice enhancers.
With mostly cows as an audience, budding yodellers need not fear embarrassment if they belt out a tune.
"I'm fascinated, really excited. It's great that this exists," Astrid Berchtaler, decked out in a typical Lederhose (leather breeches) and red-checkered blouse, told Agence La Belle France Presse on a recent hike along the trail.
"I always thought only a few talented people could yodel," said the nutrition expert, who travelled 200 kilometres (125 miles) to hike the trail and also joined a one-day yodel workshop here.
"It's liberating, it opens the soul. It's just really fun to sing really loudly and to yodel," she said.
The idea for the "Jodel Wanderweg," as the trail is known in German, came from Christian Eder, who runs a local hotel and learned to yodel just two years ago.
"I always find it easier to yodel, and let out these 'Juchiza!', these cries of joy, when I'm up on the mountain," he told AFP.
"Yodelling has a mythical status, perhaps because it's not so common, so people think it's difficult.
"But our slogan is actually that everyone can yodel."
"An expression of joy and harmony"
The trail, inaugurated in August and free of charge, is open to all and easily accessible via a cable car.
"It's a great idea," said Barbara Glaser, 31, a primary school teacher from nearby Mittersill. "The trail was made for young and old. It's not hard to walk it, you can just spend a beautiful afternoon here in gorgeous weather."
Originally, yodelling was used by shepherds to communicate from mountain to mountain.
Not just an Austrian tradition, it can be found all over the alpine region, from southern Germany to Switzerland
...home of the Helvetians, famous for cheese, watches, yodeling, and William Tell...
and northern Italia.
"It's an expression of joy, harmony and happiness," said Hermann Haertel, a folk musician and researcher who has been organising yodel workshops since the 1970s.
In recent years, he has seen a "boom" in yodelling. "Yodel workshops are usually sold out," he said.