Development of Gregorian Chant
... These pieces are known as Gregorian chant. ... The body of texts and rites that make up the sacred service evolved over many centuries along with the chant. ... ” Once organum was introduced, notation and chant evolved even more. ... One popular organum practice in the Notre Dame school were clausula; “a closed form in discant style in which a chant melisma is heard twice in the tenor. ... Chant tenors were now only a formal worship function. ... Chant would now, like conch shells and dance drums, become antique and outdated.