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comparison with caccia
...such as the hunt or the marketplace, and horn calls, bird calls, shouts, and dialogue frequently animated the musical settings. The caccia was related in name to a 14th-century French genre, the chace, a setting of a text in three-part canon. The English catch, a 17th-century type of round, may derive its name from caccia.
The lai was monophonic music, having one unharmonized melody line. But in the 14th century the poet and composer Guillaume de Machaut set 2 of his 18 lais polyphonically, using a form called the chace, a three-part canon at the unison (all voices in strict melodic imitation at the same pitch level). Machaut typically wrote lais of 12 stanzas, the last of which shared the melody and poetic form...