John Calvin Commentary Psalms 150:3

"Praise him with trumpet sound: Praise him with psaltery and harp." — Psalms 150:3 (ASV)

Praise him with sound of trumpet. I do not insist on the specific Hebrew words for the musical instruments; only let the reader remember that various different kinds are mentioned here, which were in use under the Old Testament system, the more strongly to teach the children of God that they cannot apply themselves too diligently to praising God — as if He would command them to bring all their powers vigorously to this service and devote themselves completely to it.

Nor was it without reason that God, under the Law, commanded this multiplicity of songs, so that He might lead people away from those vain and corrupt pleasures to which they are excessively addicted, toward a holy and profitable joy. Our corrupt nature indulges in excessive liberties, with many devising preposterous methods of gratification, while their highest satisfaction lies in suppressing all thoughts of God.

This perverse disposition could only be corrected by God's retaining a weak and ignorant people under many restraints and constant practices. The Psalmist, therefore, when exhorting believers to pour forth all their joy in praising God, enumerates one after another all the musical instruments that were then in use, and reminds them that all these instruments ought to be consecrated to the worship of God.