Yma Sumac was a phenomenon in the music world during the early '50s. With an amazing vocal range of four octaves, this attractive, mysterious woman with a voluptuous figure catapulted onto the American music scene with a 10 inch album Voice Of Xtabay that topped the US charts in 1950. Everything surrounding Yma Sumac had an air of mystery about it, she was said to have been born in a tiny village in the Peruvian high Andes and was a descendant of the Inca Kings and her exotic repertoire was said to be based on Inca legends. This is a great way to discover Yma's unusual vocal ability. Proper. 2006.