Yes I understand that keppel, and you are quite correct in this.

But if the new work shall show clear originality, it is a little easier if it is recreated/repainted in a new medium don't you think? If we shouldn't allow this, half of the western art/music masterpieces could be ditched. Actually you don't have to change a thing. It may be enough to ADD to show enough originality. Like with Ave Maria.

"Written by French Romantic composer Charles Gounod in 1859, Ave Maria consists of a melody superimposed over the Prelude No. 1 in C major from Book I of the Well-Tempered Clavier (BWV 846), composed by J. S. Bach some 137 years earlier. The result is a remarkable juxtaposition of these short works by two unrelated composers that fits perfectly as a melody and accompaniment."