Wiki .. yodeling
http://en.wikipedia.org/wiki/Yodeling
""... it was developed in the Central Alps as a method of communication between
alpine mountaineers or between alpine villages, with this non-musical multi-pitched
"yelling" later becoming part of the region's traditional lore and musical expression.""
New World Encyclopedia :
http://www.newworldencyclopedia.org/...ng#Switzerland
""The earliest mention of the yodel dates back to the fourth century C.E.,
and Roman Emperor Julian complaining about the wild, shrieking songs coming
from the mountain people to the north. "" ..
..