The problem is about the repertoire decision making/maker, not the piano.
Actually, if the pastor is seeking musico-liturgical advice from someone who claims no expertise in the subject instead of discussing the matter with the director of music, there may already be some conflict in their relationship.
The only thing about this situation that I know for sure is this: the psalm is PROPERLY proclaimed FROM THE AMBO. This is in the documents.
The sanctuary is the place where the altar stands, where the word of God is proclaimed, and where the priest, the deacon, and the other ministers exercise their offices. It should suitably be marked off from the body of the church either by its being somewhat elevated or by a particular structure and ornamentation. It should, however, be large enough to allow the Eucharist to be celebrated properly and easily seen.
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