Fried canticles? Hmmm.... :bigsmile:
Colleen,
The Regulative Principle of Worship, upon which the practice of Exclusive Psalmody is based, applies only to specific stated times of worship. Those stated times may be in the corporate, family or personal settings, but outside those stated times of worship, the RPW does not apply. Thus, to answer your question, outside of such stated times of worship, uninspired hymns or other such compositions are not prohibited by the RPW per se.
My own denomination, the Presbyterian Reformed Church, is one of a small handful of American Presbyterian denominations which adhere to Exclusive Psalmody (sung a cappella) and the RPW. We have been greatly blessed as a family by singing God's Word in corporate, family and private worship.
As Dietrich Bonhoeffer once said, "Wherever the Psalter is abandoned, an incomparable treasure vanishes from the Christian church. With its recovery will come unexpected power."
There is a place for hymns, I believe, like Christian poetry. A Mighty Fortress is Our God and other such compositions are a great source of edification. But they lack Scriptural warrant for stated times of worship. God's Psalter is given to us for His own divinely-approved worship.
As Calvin said, quoting Augustine, "Now, what Augustine says is true, namely that no one can sing anything worthy of God which he has not received from Him. Therefore, even after we have carefully searched everywhere, we shall not find better or more appropriate songs to this end than the Psalms of David, inspired by the Holy Spirit. And for this reason, when we sing them, we are assured that God puts the words in our mouth, as if He Himself were singing through us to exalt His glory..."