Is it not highly questionable that such treatment makes 'non-pop' of pop? This is, is it not, but a modern chapter of the late mediaeval-renaissance redemption of secularisms. After all, l'homme arme was no longer 'popular music' after Josquin had operated on it. We could use more of this... so could our youth!!!
But there is still the question of "provenance" to consider, I should think.
For as long as a tune bears certain connotations -- visually as well as aurally, I'd say these days -- it simply cannot be used liturgically, whatever its merits may be musically.
Another fun non-liturgical composition of this ilk is the “Trio in a Style of Bach: Alles Was Du Bist”* by Billy Nalle, which was played at both the AGO and ATOS conventions back in 1966. The cantus firmus in this “chorale prelude” is in the left hand:
I'd say so, provisionally. Perhaps there is a subjective as well as an objective component to the question, though. Before I read this post, for example, I'd have judged a Sanctus composed on the theme above on its own merits, without taking into consideration its attribution to the Lady Gaga.
For as long as a tune bears certain connotations -- visually as well as aurally, I'd say these days -- it simply cannot be used liturgically, whatever its merits may be musically.
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