Sing Joyfully to the LORD!
This is a great homily from Fr. John Hollowell about the role that music plays in Mass.
Mass, he says is not about eliciting an emotional reaction. It isn't just about seeking to make us feel a certain way. This speaks to the 'emotionalism' which is a product of the 'Spirit of Vatican II' attitude: religion should make us 'feel nice'. No. Rubbish. Mass is an encounter with Our LORD and the music at Mass should stir our minds and souls with faith and give praise to Him.
If we add music to elicit an emotional response, we hi-jack the Mass and we fail in the mind of the Church, turning the Mass into a commercial enterprise in order to elicit an emotional response. In other words, the act of worship, which should be ordered to God, becomes an act of self adulation, where we become focused on ourselves and our own cleverness.