Quodlibet
A humorous type of music in which well-known
melodies or texts are combined in an advisedly incongruous manner.
In the polyphonic type, different melodies
or snatches of melodies are used simultaneously in
different voice-parts of a polyphonic composition. This method
appears in some 13th-century motets, in which
refrains of trouvere songs
occur in the upper voice against the liturgical melody (borrowed from Gregorian
chant) in the tenor. The successive
quodlibet is a simpler type in which various melodies are quoted in
succession. In the textual
quodlibet borrowed text is used either simultaneously
or in succession.