<Li> Izvika singing, in Serbia </Li> <Li> Woman choirs of Shopi (Bistritsa Babi) and Pirin, in Bulgaria </Li> <P> Incipient polyphony (previously primitive polyphony) includes antiphony and call and response, drones, and parallel intervals . </P> <P> Balkan drone music is described as polyphonic due to Balkan musicians using a literal translation of the Greek polyphōnos (' many voices'). In terms of Western classical music, it is not strictly polyphonic, due to the drone parts having no melodic role, and can better be described as multipart . </P>

When imitation is continuous with one voice always following after another this is known as