Trope (music)
A trope or tropus may refer to a variety of different concepts in medieval, 20th-, and 21st-century music. The term ''trope'' derives from the Greek (''tropos''), "a turn, a change", related to the root of the verb (''trepein''), "to turn, to direct, to alter, to change". The Latinised form of the word is ''tropus''. In music, a trope is adding another section, or trope to a plainchant or section of plainchant, thus making it appropriate to a particular occasion or festival. Medieval music From the 9th century onward, trope refers to additions of new music to pre-existing chants in use in the Western Christian Church. Three types of addition are found in music manuscripts: # new melismas without text (mostly unlabelled or called "trope" in manuscripts) # addition of a new text to a pre-existing melisma (more often called ''prosula'', ''prosa'', ''verba'' or ''versus'') # new verse or verses, consisting of both text and music (mostly called trope, but also ''laudes'' or ' ...
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