For several decades now, the excellence of Sardinian tenor singing has a name: Tenores di Bitti. This dvd, Ancestral Voices, is dedicated to the group that made history in this fascinating field of male polyphony. There are few works that address this topic, but it certainly lacked a film that would document extensively this age-old vocal style. This is the first product of its kind on the market and it fills a void difficult to explain. The video is divided into two parts. The first part is a live recording of the Tenores Di Bitti in concert in Turin (50 minutes) showing their vocal art and the variety of their repertoire, which includes serenades, traditional dances, satirical songs, poetry and religious hymns. The second part consists of a series of interviews with the members of the group carried out in Sardinia (45 minutes). Each component in turn explains us the origins of this ancestral song, the characteristics of their voices and the techniques used to harmonize in the choir. This video takes us through the discovery and understanding of one of the most fascinating phenomena and ancient Mediterranean voice, a singing style that has been declared by UNESCO as "Intangible Heritage of Humanity".