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 an chord in just intonation. Piero Sanna and Daniele Cossellu alternate boke and mesa 'oke on different songs while on all songs Tancredi Tucconi and Mario Pira take contra and bassu respectively.[1]