Tenores di Bitti

The Tenores di Bitti are a traditional folk music group from Bitti, Sardinia who employ a polyphonic vocal style, often described as a type of overtone singing, whose oral tradition dates back to 3000 BC.

[1] The Tenores di Bitti are considered one of the best and most traditional groups in Sardinia.

They extemporize or perform poems with each singer taking one of four parts: boke, bassu, contra, or mea'oke.

Boke is the soloist and provides melody, bassu is the root and provides the tonic, contra provides the fifth, and mea'oke provides the octave above the fifth, filling out a chord in just intonation.

[1] Their album S'amore 'e mama includes the ambient noises of the various recording locations in Bitti including churches, streets, canteens, bars, countryside, and "nuraghe".