Historians often call twinsong-type pieces like these “gymels,” appropriating from the English
musical vocabulary of the fifteenth century a handy word that actually derives from the Latin gemellus,
“twin.” A true fifteenth-century gymel, however, is something else: a temporarily split choral voice, like a
modern orchestral “divisi.”
EX. 11-5 Jesu Cristes milde moder, beginning