Formely known as Elektroninės Sutartinės. SUTARTRONICA Sutartinės (Lithuanian multipart songs) Cultural Heritage of Humanity (UNESCO). Sutartinės (from the word sutarti – to be in concordance) is a form of polyphonic music performed by female singers in north-east Lithuania. The songs have simple melodies, with two to five pitches, and comprise two distinct parts: a meaningful main text and a refrain that may include nonce words. There are almost forty different styles and ways of performing Sutartinės. Mainly, they can be performed by two singers in parallel seconds; by three singers in strict canon, all performing both phrases of the melody at staggered intervals; or by two groups of singers, the lead singer of each pair singing the main text, while the partner sings the refrain, before the second pair repeats. The poetic texts encompass many themes, including work, calendar rituals, weddings, family, wars, history and moments of daily life.