The International Commission on English in the Liturgy (ICEL) is a mixed commission of Catholic Bishops’ Conferences in countries where English is used in the celebration of the Sacred Liturgy according to the Roman Rite. The purpose of the Commission is to prepare English translations of each of the Latin liturgical books and any individual liturgical texts in accord with the directives of the Holy See. For details, read Music for the English Language Roman Missal – An Introduction (20 pages), which explains how the tones of the Roman Missal were adapted from Latin to English.

http://www.icelweb.org/musicfolder/openmusic.php

Singing tones for the Roman Missal (download music from above link)