216. The Preface is sung or said by the principal Priest Celebrant alone; but the Sanctus (Holy, Holy, Holy) is sung or recited by all the concelebrants, together with the people and the choir.
217. After the Sanctus (Holy, Holy, Holy), the concelebrating Priests continue the Eucharistic Prayer in the way described below. Only the principal celebrant makes the gestures, unless other indications are given.
218. The parts pronounced by all the concelebrants together and especially the words of Consecration, which all are obliged to say, are to be recited in such a manner that the concelebrants speak them in a low voice and that the principal celebrant’s voice is heard clearly. In this way the words can be more easily understood by the people.
It is a praiseworthy practice for the parts that are to be said by all the concelebrants together and for which musical notation is provided in the Missal to be sung.
Pronunciation is important not only because the Holy Spirit has to hear the right words, but also the assembly.
The particulars of the four main Eucharistic Prayers may be of less interest to almost all readers. I’ll comment that the references to Eucharistic Prayer I (219-225) are given in Latin and English, but that prayers II (226-228), III (229-231), and IV (232-234) in English only.
235. As for other Eucharistic Prayers approved by the Apostolic See, the norms laid down for each one are to be observed.
236. The concluding doxology of the Eucharistic Prayer is pronounced solely by the principal Priest Celebrant or together, if this is desired, with the other concelebrants, but not by the faithful.