We were relaxing in our most excellent AirBNB in Lucerne, in an old town historic square. Suddenly, we heard some deep rich horn sounds from below. We opened the windows to the sight of a semicircle of AlpHorns, playing to a crowd. It is hard to explain the richness of the sound, echoing off the buildings, but these videos come somewhat close.
The alphorn or alpenhorn or alpine horn is a labrophone, consisting of a wooden natural horn of conical bore, having a wooden cup-shaped mouthpiece, used by mountain dwellers in the Swiss Alps, Austrian Alps, Bavarian Alps in Germany, French Alps, and elsewhere.