Also, check out:

Can a Musical Work Be Created? Caplan, Ben, Matheson, Carl. British Journal of Aesthetics, 44(2), 113-134, 22 p. April 2004. Abstract Available (AN PHL1780092

and

Fine Individuation Matheson, Carl, Caplan, Ben. British Journal of Aesthetics, 47(2), 113-137, 25 p. April 2007.

Both are evailable. BTW, I don't know what's going on with the italics.