What is the difference between “trope” and “clausula”?
A “trope” is usually applied to monophonic chant. It is an addition of text, music, or both, attached to the original chant and performed with it (see NAWM 7, which is also an example of “liturgical drama”). A “clausula” is always polyphonic, although it has in common with the trope that text can be added to the preexistent music.
