“If instruments are used in public worship, it ought to be only as aids to congregational singing. Where they discourage this, they are an intolerable offence.
Light and silly voluntaries, long and unmeaning interludes between the stanzas, loud accompaniment, fancy stop, and see-saw swell-playing, and other things similar, should be wholly discountenanced.”
–William Plumer, Psalms: A Critical and Expository Commentary with Doctrinal and Practical Remarks (Carlisle, PA: Banner of Truth Trust, originally published in 1867; reprinted 2016), 413. Plumer is commenting on Psalm 33.