Heimr Àrnadalr

La bukkehorn:

Kulning, or herding calls (called kauking and kaukning in some parts of Norway, in the province of Dalarna in Sweden and the former Norwegian provinces in Sweden Jämtland and Härjedalen, also kulokker, kyrlokker or a lockrop) is a domestic Scandinavian music form, often used to call livestock (cows, goats, etc.) down from high mountain pastures where they have been grazing during the day. It is possible that the sound also served to scare away predators (wolves, bears, etc.), but this was not the main purpose of the call.
The song form is often used by women, as they were the ones tending the herds and flocks in the high mountain pastures, but there are recordings of these calls sung by men. There is some speculation that it was one of the first ways to tame animals in herds (see domestication) in the Scandinavian and Ural regions, with pre-historic origins. The knowledge about it today originates, however, from regions near mid Fennoscandia.
The song has a high-pitched vocal technique, i.e. a loud call using head tones, so that it can be heard or be used to communicate over long distances. It has a fascinating and haunting tone, often conveying a feeling of sadness, in large part because the lokks often include typical half-tones and quarter-tones (also known as "blue tones") found in the music of the region.
The kulokks can belong to an individual, but are sometimes family-based and are handed down so that a family's cows know they are being called and thus respond. A number of calls contain names of individual (sometimes the "lead") animals, as herds are not very large.