Question

The notre dame style of polyphony, in which the tenor line was based on a pre existing chant melody and the upper voice moved freely (and more rapidly), was called:

Answer 1

This style of chanting is called organum. Organum is a form of music from medieval times that is based on an existing melody. It includes an added voice that helps enhance the harmony of the music. It is often seen in Gregorian chanting and is one of the earliest types of music.