Excerpt from The Fundamentals of Gregorian Chant: A Simple Exposition of the Solesmes, Principles Founded Mainly on "Le Nombre Musical Gregorien" Of Dom Andre Mocquereau The terms Gregorian Chant Plainchant Plainsong Liturgical Chant Cantus Planus and other similar appellations, denote that universal liturgical song of the Latin Church, from the first centuries to the present time. It is the only liturgical music of the Roman Church, as it is the only music sung at the altar. While Classical Polyphony and the music of other great schools of Church Music are permitted, the Chant remains the true Song of the Latin Church. The Latin term, Cantus Planus refers to the ancient mode of execution, since the difference in the duration of the single notes of the (plainchant' was not so great as in Figured Music. According to an author of the 13th Century, Elias Salomon It is a music sung on one plane, and no part of it is to be quicker than the other which simply means that each note is equal. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works."