Musicians, vocalists, and choirs have a secondary role, a subordinate role, not even a necessary role (we can sing acapella), what ideally should be a hidden role. They are there to support, encourage, and beautify the singing of the congregation. Recognizing that congregational singing is the divinely authorized element also should determine song selection.
Does the PCA in general understand the role of music in the worship of the Reformed Church? The answer must be no if our annual experience at the General Assembly gives any indication. What the Reformation revived was the congregational singing of the patristic church. The medieval church had musical instruments and choirs. They provided the music. Congregations sat mute as the “professionals’ performed. The Reformers rightly restored the singing of the congregation whether hymns (Lutherans) or psalms (Reformed) as one of five essential elements in the ordinary worship of the church. It was elevated to this place of prominence along with the reading and preaching of Scripture, prayer, and the administration of the sacraments. Congregational singing even takes on confessional status in the Westminster standards (WCF XXI.5; Directory for the Public Worship of God, “Of Singing of Psalms).
Yet year in and year out we assemble, 3000 strong, only to have the musicians, vocalists, and choirs overwhelm the gathered congregation.