Note: This and many songs in the Ibiza and Formentera recordings are a genre unique to these islands, characterized by a vocal glottal ornament whose origins have never been established, The songs are sung with a limited range, and with microtones; words are all-important, and are not usually improvised or not completely, but composed by the singers, wholly or partially in advance of the occasion. These songs are sung with only a small struck drum, either by one person alone or by two as a song duel, usually sharing the drum. Description: It can be sung by a man or a woman, or by two, as a song duel.