what was the first type of polyphony?
early polyphony Techniques for spicing up plainchant eventually led to polyphony: music with two or more independent lines. Without compromising the integrity and primacy of the chant line, medieval sacred music explored the following: Organum (natural divisions of octaves occur at fourths and fifths; to the vox principalis was added a line moving at a constant interval and called the vox organalis).