Context: The Carnyx was a Celtic instrument used for ~ 400 years between 200 BCE to 200 CE. A large S shaped wind instrument, with the head decorated and formed into a boars. According to the Greek historian Polybius (~206-126BC) accounts it was at least used during warfare:

There were countless trumpeters and horn blowers and since the whole army was shouting its war cries at the same time there was such a confused sound that the noise seemed to come not only from the trumpeters and the soldiers but also from the countryside which was joining in the echo.