Mass (music)

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In music the word mass means a piece of music, to be sung by a choir, which uses the words of the church service known as the Eucharist. The words are in Latin as they are taken from the Roman Catholic service.

The usual words that are set to music are known as the Ordinary. These are the words of the service which are the same every day. The Ordinary consists of five parts: Kyrie (Lord have mercy upon us….), Gloria (Glory be to thee….), Credo (I believe in God the Father….), Sanctus (Holy, Holy, Holy….) and Agnus Dei (O Lamb of God…).

The words of the mass that are not from the Ordinary are called the Proper. These are words that may change in the service from day to day. The Proper consists of the Introit, Gradual, Alleluia, Tract, Offertory and Communion. There are also some words which are special for particular feast days.

In the Renaissance period church composers set the words of the Ordinary mass to music. This music was normally polyphonic: the different sections of the choir (soprano, alto, tenor and bass) all had musical lines which shared the melody and were of equal importance. The words of the Proper were not composed to special music. They were sung to plainchant.

During the last two centuries many composers have written masses which were not meant to be sung in a church service: they are written as concert pieces. Some of them are quite long and fill a whole concert programme. Some of the most famous masses are those by Bach, Mozart, Beethoven, Schubert, Berlioz, Dvořák, Verdi, Bruckner, Fauré and Vaughan Williams.

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