Yma Súmac, also earlier spelled Ymma Sumak (from "Ima Shumaq", Quechua for "how beautiful!") or Imma Sumack, is a noted vocalist of Peruvian origin. In the 1950s, she was one of the most famous proponents of exotica music, and became an international success based on the merits of her wide-ranging voice, which ranges "well over three octaves" and was commonly claimed to span four and five octaves at its peak. Wikipedia
The definitive Wikipedia entry for Yma Súmac. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Yma_S%c3%bamac
A site for classical singers, students and operatic enthusiasts interested in understanding operatic tradition through its recorded legacy. Some of the most satisfying recordings made during the past 100 years have been tho www.divalegacy.com/