Traditionally dressed alphorn blowers step into the arena during the ESAF-Federal Alpine Wrestling Festival (Eidgenoessisches Schwing- und Aelplerfest) in Zug, Switzerland, August 25, 2019. REUTERS/Moritz Hager

A wooden statue of an alphorn blower is seen at the stadium of the ESAF-Federal Alpine Wrestling Festival (Eidgenoessisches Schwing- und Aelplerfest) in Zug, Switzerland August 23, 2019. REUTERS/Arnd Wiegmann

A wooden statue of an alphorn blower is seen at the stadium of the ESAF-Federal Alpine Wrestling Festival (Eidgenoessisches Schwing- und Aelplerfest) in Zug, Switzerland August 23, 2019. REUTERS/Arnd Wiegmann

Musicians present alphorns during the official opening ceremony of the World Economic Forum (WEF) annual meeting in Davos, Switzerland, January 22, 2019. REUTERS/Arnd Wiegmann

Musicians play alphorns during the official opening ceremony of the World Economic Forum (WEF) annual meeting in Davos, Switzerland, January 22, 2019. REUTERS/Arnd Wiegmann

Musicians play alphorns during the official opening ceremony of the World Economic Forum (WEF) annual meeting in Davos, Switzerland, January 22, 2019. REUTERS/Arnd Wiegmann

Lisa Stoll plays an alphorn as she stands on a platform overlooking Lake Lucerne before the Red Bull Cliff Diving series in Sisikon, Switzerland, August 5, 2018. REUTERS/Denis Balibouse

Lisa Stoll plays an alphorn as she stands on a platform overlooking Lake Lucerne before the Red Bull Cliff Diving series in Sisikon, Switzerland, August 5, 2018. REUTERS/Denis Balibouse

Alphorn blowers perform on Schwaegalp near the north-eastern Swiss landmark Mount Saentis, Switzerland July 31, 2018. REUTERS/Arnd Wiegmann

Alphorn blowers perform an ensemble piece on the last day of the Alphorn International Festival on the alp of Tracouet in Nendaz, southern Switzerland, July 22, 2018. REUTERS/Denis Balibouse TPX IMAGES OF THE DAY TPX IMAGES OF THE DAY

Alphorn blowers perform an ensemble piece on the last day of the Alphorn International Festival on the alp of Tracouet in Nendaz, southern Switzerland, July 22, 2018. REUTERS/Denis Balibouse TPX IMAGES OF THE DAY

Alphorn blowers arrive at the last day of the Alphorn International Festival on the alp of Tracouet in Nendaz, southern Switzerland, July 22, 2018. REUTERS/Denis Balibouse TPX IMAGES OF THE DAY

A flag thrower and alphorn blowers perform on the last day of the Alphorn International Festival on the alp of Tracouet in Nendaz, southern Switzerland, July 22, 2018. REUTERS/Denis Balibouse

Alphorn blowers perform an ensemble piece on the last day of the Alphorn International Festival on the alp of Tracouet in Nendaz, southern Switzerland, July 22, 2018. REUTERS/Denis Balibouse

Alphorn blowers perform an ensemble piece on the last day of the Alphorn International Festival on the alp of Tracouet in Nendaz, southern Switzerland, July 22, 2018. REUTERS/Denis Balibouse

A child reacts as alphorn blowers perform an ensemble piece on the last day of the Alphorn International Festival on the alp of Tracouet in Nendaz, southern Switzerland, July 22, 2018. REUTERS/Denis Balibouse

Alphorn blowers perform an ensemble piece on the last day of the Alphorn International Festival on the alp of Tracouet in Nendaz, southern Switzerland, July 22, 2018. REUTERS/Denis Balibouse

Alphorn blowers perform an ensemble piece on the last day of the Alphorn International Festival on the alp of Tracouet in Nendaz, southern Switzerland, July 22, 2018. REUTERS/Denis Balibouse

A flag thrower and alphorn blowers perform on the last day of the Alphorn International Festival on the alp of Tracouet in Nendaz, southern Switzerland, July 22, 2018. REUTERS/Denis Balibouse

A woman with a dog is seen as alphorn blowers perform an ensemble piece on the last day of the Alphorn International Festival on the alp of Tracouet in Nendaz, southern Switzerland, July 22, 2018. REUTERS/Denis Balibouse

A man with a dog are seen as alphorn blowers perform an ensemble piece on the last day of the Alphorn International Festival on the alp of Tracouet in Nendaz, southern Switzerland, July 22, 2018. REUTERS/Denis Balibouse

Alphorn blowers perform an ensemble piece on the last day of the Alphorn International Festival on the alp of Tracouet in Nendaz, southern Switzerland, July 22, 2018. REUTERS/Denis Balibouse

Alphorn blowers perform an ensemble piece on the last day of the Alphorn International Festival on the alp of Tracouet in Nendaz, southern Switzerland, July 22, 2018. REUTERS/Denis Balibouse

Alphorn blowers pose for a photo on the last day of the Alphorn International Festival on the alp of Tracouet in Nendaz, southern Switzerland, July 22, 2018. REUTERS/Denis Balibouse

Alphorn blowers arrive at the last day of the Alphorn International Festival on the alp of Tracouet in Nendaz, southern Switzerland, July 22, 2018. REUTERS/Denis Balibouse

Alphorn blowers perform an ensemble piece on the last day of the Alphorn International Festival on the alp of Tracouet in Nendaz, southern Switzerland, July 22, 2018. REUTERS/Denis Balibouse

Alphorn blowers perform an ensemble piece on the last day of the Alphorn International Festival on the alp of Tracouet in Nendaz, southern Switzerland, July 22, 2018. REUTERS/Denis Balibouse

An alphorn blower performs an ensemble piece on the last day of the Alphorn International Festival on the alp of Tracouet in Nendaz, southern Switzerland, July 22, 2018. REUTERS/Denis Balibouse

A general view of alphorn blowers performing an ensemble piece on the last day of the Alphorn International Festival on the alp of Tracouet in Nendaz, southern Switzerland, July 22, 2018. REUTERS/Denis Balibouse

Alphorn blowers perform an ensemble piece on the last day of the Alphorn International Festival on the alp of Tracouet in Nendaz, southern Switzerland, July 22, 2018. REUTERS/Denis Balibouse

An alphorn blower performs an ensemble piece on the last day of the Alphorn International Festival on the alp of Tracouet in Nendaz, southern Switzerland, July 22, 2018. REUTERS/Denis Balibouse

An alphorn blower arrives at the last day of the Alphorn International Festival on the alp of Tracouet in Nendaz, southern Switzerland, July 22, 2018. REUTERS/Denis Balibouse

An alphorn blower arrives at the last day of the Alphorn International Festival on the alp of Tracouet in Nendaz, southern Switzerland, July 22, 2018. REUTERS/Denis Balibouse

Members of Incheon Alpenrose choir play alphorns at the house of Switzerland at Yongpyong ski resort in Pyeongchang, South Korea February 18, 2018. REUTERS/Murad Sezer

Alphorn players perform during a ceremony at the Federal Alpine Wrestling Festival (Eidgenoessisches Schwing- und Aelplerfest) in Estavayer-le-Lac August 28, 2016. REUTERS/Denis Balibouse

Alphorn players arrive for a ceremony during the Federal Alpine Wrestling Festival (Eidgenoessisches Schwing- und Aelplerfest) in Estavayer-le-Lac August 28, 2016. REUTERS/Denis Balibouse

Alphorn blowers and flag throwers perform an ensemble piece on the last day of the International Alphorn Festival on Lac de Tracouet near the village of Nendaz, Switzerland, July 27, 2014. REUTERS/Pierre Albouy/File Photo

A Alphorn band in traditional Bavarian clothes play instruments during the traditional concert at the 182nd Oktoberfest in Munich September 27, 2015. Millions of beer drinkers from around the world will come to the Bavarian capital for the Oktoberfest, which runs until October 4, 2015. REUTERS/Michael Dalder

Spectators and alphorn blowers arrive for the Swiss national holiday celebrations on the Ruetli meadows in central Switzerland August 1, 2015. REUTERS/Arnd Wiegmann

A man takes a picture of two alphorn blowers on his way to Switzerland's national holiday celebrations at the Ruetli meadows in central Switzerland August 1, 2015. REUTERS/Arnd Wiegmann

People in traditional Bavarian clothes play alphorns during the traditional concert at the 181st Oktoberfest in Munich September 28, 2014. Millions of beer drinkers from around the world will come to the Bavarian capital for the Oktoberfest, which runs until October 5. REUTERS/Michaela Rehle (GERMANY - Tags: SOCIETY)

People in traditional Bavarian clothes play alphorns during the traditional concert at the 181st Oktoberfest in Munich September 28, 2014. Millions of beer drinkers from around the world will come to the Bavarian capital for the Oktoberfest, which runs until October 5. REUTERS/Michaela Rehle (GERMANY - Tags: SOCIETY)

Alphorns are pictured during the Alpine Wrestling Festival on Riffelberg in front of the Matterhorn mountain near Zermatt, September 13, 2014. Swiss Alpine wrestling, called "Schwingen", is the oldest sport in Switzerland. REUTERS/Thomas Hodel (SWITZERLAND - Tags: SOCIETY SPORT)

Alphorn players perform during the Alpine Wrestling Festival on Riffelberg in front of the Matterhorn mountain near Zermatt, September 13, 2014. ISwiss Alpine wrestling, called "Schwingen", is the oldest sport in Switzerland. REUTERS/Thomas Hodel (SWITZERLAND - Tags: SOCIETY SPORT)

An alphorn is pictured during the Alpine Wrestling Festival on Riffelberg in front of the Matterhorn mountain near Zermatt, September 13, 2014. Swiss Alpine wrestling, called "Schwingen", is the oldest sport in Switzerland. REUTERS/Thomas Hodel (SWITZERLAND - Tags: SOCIETY SPORT)

A flag thrower, a yodeller and an alphorn player perform during the Alpine Wrestling Festival on Riffelberg in front of the Matterhorn mountain near Zermatt, September 13, 2014. Swiss Alpine wrestling, called "Schwingen", is the oldest sport in Switzerland. REUTERS/Thomas Hodel (SWITZERLAND - Tags: SOCIETY SPORT)

General view of alphorn blowers and flag throwers performing an ensemble piece on the last day of the International Alphorn Festival on Lac de Tracouet near the village of Nendaz, July 27, 2014. About 150 alphorn blowers took part in the contest this year. REUTERS/Pierre Albouy (SWITZERLAND - Tags: SOCIETY TRAVEL ENVIRONMENT)

Alphorn blowers perform an ensemble piece on the last day of the International Alphorn Festival on Lac de Tracouet near the village of Nendaz, July 27, 2014. About 150 alphorn blowers took part in the contest this year. REUTERS/Pierre Albouy (SWITZERLAND - Tags: SOCIETY TRAVEL ENVIRONMENT)

Alphorn blowers and flag throwers perform an ensemble piece on the last day of the International Alphorn Festival on Lac de Tracouet near the village of Nendaz, July 27, 2014. About 150 alphorn blowers took part in the contest this year. REUTERS/Pierre Albouy (SWITZERLAND - Tags: SOCIETY TRAVEL ENVIRONMENT)

Alphorn blowers perform an ensemble piece on the last day of the International Alphorn Festival on Lac de Tracouet near the village of Nendaz, July 27, 2014. About 150 alphorn blowers took part in the contest this year. REUTERS/Pierre Albouy (SWITZERLAND - Tags: SOCIETY TRAVEL ENVIRONMENT)

Alphorn blowers perform an ensemble piece on the last day of the International Alphorn Festival on Lac de Tracouet near the village of Nendaz, July 27, 2014. About 150 alphorn blowers took part in the contest this year. REUTERS/Pierre Albouy (SWITZERLAND - Tags: SOCIETY TRAVEL ENVIRONMENT)

Alphorn blowers perform an ensemble piece on the last day of the International Alphorn Festival on Lac de Tracouet near the village of Nendaz, July 27, 2014. About 150 alphorn blowers took part in the contest this year. REUTERS/Pierre Albouy (SWITZERLAND - Tags: SOCIETY TRAVEL ENVIRONMENT)

Alphorn blowers perform an ensemble piece on the last day of the International Alphorn Festival on Lac de Tracouet near the village of Nendaz, July 27, 2014. About 150 alphorn blowers took part in the contest this year. REUTERS/Pierre Albouy (SWITZERLAND - Tags: SOCIETY TRAVEL ENVIRONMENT)

Alphorn blowers and a flag thrower perform an ensemble piece on the last day of the International Alphorn Festival on Lac de Tracouet near the village of Nendaz, July 27, 2014. About 150 alphorn blowers took part in the contest this year. REUTERS/Pierre Albouy (SWITZERLAND - Tags: SOCIETY TRAVEL ENVIRONMENT)

Alphorn blowers and flag throwers perform an ensemble piece on the last day of the International Alphorn Festival on Lac de Tracouet near the village of Nendaz, July 27, 2014. About 150 alphorn blowers took part in the contest this year. REUTERS/Pierre Albouy (SWITZERLAND - Tags: SOCIETY TRAVEL ENVIRONMENT)

Alphorn blowers and flag throwers perform an ensemble piece on the last day of the International Alphorn Festival on Lac de Tracouet near the village of Nendaz, July 27, 2014. About 150 alphorn blowers took part in the contest this year. REUTERS/Pierre Albouy (SWITZERLAND - Tags: SOCIETY TRAVEL ENVIRONMENT)

Alphorn blowers perform an ensemble piece on the last day of the International Alphorn Festival on Lac de Tracouet near the village of Nendaz, July 27, 2014. About 150 alphorn blowers took part in the contest this year. REUTERS/Pierre Albouy (SWITZERLAND - Tags: SOCIETY TRAVEL ENVIRONMENT TPX IMAGES OF THE DAY)

Alphorn blowers perform an ensemble piece on the last day of the International Alphorn Festival on Lac de Tracouet near the village of Nendaz, July 27, 2014. About 150 alphorn blowers took part in the contest this year. REUTERS/Pierre Albouy (SWITZERLAND - Tags: SOCIETY TRAVEL ENVIRONMENT)

A young Alphorn blower carries his Alphorn before performing an ensemble piece on the last day of the International Alphorn Festival on Lac de Tracouet near the village of Nendaz, July 27, 2014. About 150 alphorn blowers took part in the contest this year. REUTERS/Pierre Albouy (SWITZERLAND - Tags: SOCIETY TRAVEL TPX IMAGES OF THE DAY ENVIRONMENT)

A flag thrower performs on the last day of the International Alphorn Festival on Lac de Tracouet near the village of Nendaz, July 27, 2014. About 150 alphorn blowers took part in the contest this year. REUTERS/Pierre Albouy (SWITZERLAND - Tags: SOCIETY TRAVEL ENVIRONMENT)