Classic Yodeling  Explained    
  Tony Clark Yodeling And Classic Songs On Itunes
Yodeling (or yodelling, jodeling) is a form of singing that involves singing an extended note which rapidly and repeatedly changes in pitch from the vocal chest register (or "chest voice") to the head register (or "head voice"), making a high-low-high-low sound, singers who master this can be very versatile, this vocal technique is used in many cultures throughout the world.
In Swiss folk music, it was probably developed in the Swiss and Austrian Alps as a Way of communication between mountain peaks, and later became a part of the traditional music of the region. In Persian and Azeri Classical musics, singers frequently use tahrir, a yodeling technique that oscillates on neighborough tones. In Georgian traditional music, yodelling takes the form of krimanchuli technique. In Central Africa, Pygmy singers use yodels within their elaborate polyphonic singing. Yodeling is often used in American bluegrass and country music
 Yodelers or Yodeling is less often seen in pop music and rock, probably because there is not much of an accompanying tradition of its use. One of the most famous examples of yodeling  songs  in popular music Hocus Pocus by the Dutch rock group Focus. International pop star Jewel is another example - she can yodel , and while she does not truly yodel in her commercial music, her proficiency at it contributes to her vocal style, which features nearly instantaneous transitions between her head voice and chest voice (Falsetto) .  Pop star Shakira features similar vocal stylings in her songs. The Sound of Music, by Rodgers and Hammerstein, Has a yodelling song, The Lonely Goatherd, in which Mary Martin yodelled to good effect in the production on Broadway in 1959. Gwen Stefani also put herself to the task of yodeling the Lonely Goatheard at the beginning of her single, "Wind It Up".
 Other Singers or yodelers who have made yodeling popular include, Slim Whitman , Frank Ifield , Margo Smith , Roger Whittaker , Karl Denver , Kerry Christensen , And most recently Taylor Ware.

since july 08