The Yuman are a tribe of Native Americans from what is now Southern California. Folk songs in Yuma culture are said to be given to a person while dreaming. Many individuals who are in emotional distress go to a secluded area for a few weeks, there to receive new songs (Herzog, pp. 1-6, cited in Nettl, p. 152).

Source

• Nettl, Bruno (1965). Folk and Traditional Music of the Western Continents. Prentice-Hall, Inc.
  • George Herzog, "Music in the Thinking of the American Indian." Peabody Bulletin, May, 1933