Switzerland. Geneva. "Les Grottes" neighborhood. Two men blow the alphorn. They are used too practice every friday afternoon in the building's courtyard. The alphorn or alpenhorn or alpine horn is a labrophone, consisting of a straight several-meter-long wooden natural horn of conical bore, with a wooden cup-shaped mouthpiece. It is used by mountain dwellers in the Swiss Alpsand are today used as musical instruments. 13.11.2020 © 2020 Didier Ruef