Giac, I attended an Yma Sumac concert in a restaurant in Lima, she was in her late sixties and her voice was diminished,but was still extraordinary. Even in front of the reality of the decline of the artist, the audience listened to her in absolute silence and applauded respectfully and with enthusiasm. It was shocking to see that loyal attitude. I don't know why she was never internationally recognized as a star singer, I guess it was a wrong management who had "pidgeonholed" her into an exotic and rather artificial style.Un abrazo - Andrés